Leo the Great — Commentary on Scripture

Ezekiel 3:17

Just as the well-being of the churches causes us gratification, so we are deeply saddened whenever we learn of any liberties taken with, or acts committed against, canon law and ecclesiastical discipline. We cannot excuse ourselves to him who wished us to be on the watch if we do not repress such practices with the vigilance we should. We cannot excuse ourselves if we permit the unsullied body of the church (which we are bound to keep clean from all dirt) to be defiled by contact with those who pursue evil ends. For the very union of the members gets inharmonious elements in it through carelessness.

LETTER 4

Ezekiel 33:11

As a result, dearly beloved, it was necessary (by the designs of a secret plan) for the unchangeable God (whose will cannot be separated from his goodness) to complete by a deeper mystery the first intentions of his love. It was necessary that human beings, tricked into sin by the devil’s wickedness, should not perish in opposition to God’s plan.

SERMON 22:1, 2

Galatians 4:4

He is God in that “all things were made through him and nothing was made without him.” He is human in that he was “made from a woman, made under the law.” The nativity of his flesh shows his human nature. The virgin birth is an indicator of his divine nature.

LETTER 28, TO FLAVIAN 4

Habakkuk 2:4

And hence Tobias also, while instructing his son in the precepts of godliness, says, “Give alms of your substance, and turn not your face from any poor man. So shall it come to pass that the face of God shall not be turned from you.” This virtue makes all virtues profitable, for by its precepts it gives life to that very faith by which “the just lives” and which is said to be “dead without works.” As the reason for works consists in faith, so the strength of faith consists in works.

SERMON 10:4

Hebrews 4:15

What has been instilled in our hearts, if not that we should be “renewed” through them all “after the image” of that one who, remaining “in the form of God,” condescended to become “the form of sinful flesh”? He assumed all those weaknesses of ours that come as a result of sin, though “without” any part in “sin.” Consequently, he lacked none of the afflictions due to hunger and thirst, sleep and weariness, sadness and tears. He endured grievous sorrows even to the point of death. No one could be released from the fetters of mortality unless he, in whom alone the nature of all people was innocent, should allow himself to be killed by the hands of wicked persons.Our Savior, the Son of God, gave both a mystery and an example to all who believe in him, so that they might attain to the one by being reborn and arrive at the other by imitation. Blessed Peter the apostle teaches this, saying, “Christ also suffered for you, leaving you an example, that you should follow in his steps. He committed no sin; no guile was found on his lips. When he was reviled, he did not revile in return; when he…

What has been instilled in our hearts, if not that we should be “renewed” through them all “after the image” of that one who, remaining “in the form of God,” condescended to become “the form of sinful flesh”? He assumed all those weaknesses of ours that come as a result of sin, though “without” any part in “sin.” Consequently, he lacked none of the afflictions due to hunger and thirst, sleep and weariness, sadness and tears. He endured grievous sorrows even to the point of death. No one could be released from the fetters of mortality unless he, in whom alone the nature of all people was innocent, should allow himself to be killed by the hands of wicked persons.Our Savior, the Son of God, gave both a mystery and an example to all who believe in him, so that they might attain to the one by being reborn and arrive at the other by imitation. Blessed Peter the apostle teaches this, saying, “Christ also suffered for you, leaving you an example, that you should follow in his steps. He committed no sin; no guile was found on his lips. When he was reviled, he did not revile in return; when he suffered, he did not threaten; but he trusted to him who judges justly. He himself bore our sins in his own body on the tree, that we might die to sin and live to righteousness.”

SERMON 63

Hebrews 4:15

By the saving cooperation of the indivisible divinity, whatever the Father, whatever the Son, whatever the Holy Spirit accomplishes in a particular way is the plan of our redemption. It is the order of our salvation. For if human beings, made in the image and likeness of God, had remained in the honor of their own nature and, undeceived by the devil’s lies, had not deviated from the law placed over them for their lusts, the Creator of the world would not have become a creature. The eternal would not have undergone temporality, and God the Son, equal to God the Father, would not have assumed the “form of a servant” and the “likeness of sinful flesh.”19Since, however, “through the devil’s envy death entered the world” and because captive humanity could only be freed in one way, namely, if that one would undertake our cause who, without the loss of his majesty, would become true man, and who alone had no contagion of sin, the mercy of the Trinity divided for itself the work of our restoration so that the Father was appeased, the Son was the appeaser, and the Holy Spirit enkindled the pr…

By the saving cooperation of the indivisible divinity, whatever the Father, whatever the Son, whatever the Holy Spirit accomplishes in a particular way is the plan of our redemption. It is the order of our salvation. For if human beings, made in the image and likeness of God, had remained in the honor of their own nature and, undeceived by the devil’s lies, had not deviated from the law placed over them for their lusts, the Creator of the world would not have become a creature. The eternal would not have undergone temporality, and God the Son, equal to God the Father, would not have assumed the “form of a servant” and the “likeness of sinful flesh.”19Since, however, “through the devil’s envy death entered the world” and because captive humanity could only be freed in one way, namely, if that one would undertake our cause who, without the loss of his majesty, would become true man, and who alone had no contagion of sin, the mercy of the Trinity divided for itself the work of our restoration so that the Father was appeased, the Son was the appeaser, and the Holy Spirit enkindled the process. It was right that those to be saved should do something for themselves, and, when their hearts were turned to the Redeemer, that they should cut themselves off from the domination of the enemy. In regard to this, the apostle says, “God has sent the Spirit of his Son into our hearts crying, ‘Abba! Father!’ ” “Where the Spirit of the Lord is, there is freedom.” “No one can say ‘Jesus is Lord’ except by the Holy Spirit.”

SERMON 77

Hebrews 5:7-10

Our origin, corrupted right after its start, needed to be reborn with new beginnings. A victim had to be offered for reconciliation, a victim that was at one and the same time both related to our race and foreign to our defilement. In this way alone could the plan of God—wherein it pleased him that the sin of the world should be wiped away through the birth and passion of Jesus Christ—in this way alone could the plan of God be of any avail for the times of every generation. Nor would the mysteries—as they pass through various developments in time—disturb us. Instead, they would reassure us, since the faith by which we live would not have differed at any stage.Let them stop complaining, those who speak up against the divine arrangements with a disloyal murmuring and object to the lateness of our Lord’s nativity—as if that which was done in the last age of the world was not applied to previous eras as well. For the incarnation of the Word accomplished by being about to take place the very same thing that it did by having taken place—as the mystery of human salvation never ceased to be…

Our origin, corrupted right after its start, needed to be reborn with new beginnings. A victim had to be offered for reconciliation, a victim that was at one and the same time both related to our race and foreign to our defilement. In this way alone could the plan of God—wherein it pleased him that the sin of the world should be wiped away through the birth and passion of Jesus Christ—in this way alone could the plan of God be of any avail for the times of every generation. Nor would the mysteries—as they pass through various developments in time—disturb us. Instead, they would reassure us, since the faith by which we live would not have differed at any stage.Let them stop complaining, those who speak up against the divine arrangements with a disloyal murmuring and object to the lateness of our Lord’s nativity—as if that which was done in the last age of the world was not applied to previous eras as well. For the incarnation of the Word accomplished by being about to take place the very same thing that it did by having taken place—as the mystery of human salvation never ceased to be active in any earlier age. What the apostles preached, the prophets had also announced. Nor was it too late in being fulfilled, since it has always been believed.
But the wisdom and “kindness of God”—by this delay in his salvific work—has made us better disposed to accept his calling. That way, what had been foretold through so many ages by numerous signs, numerous words and numerous mysteries would not be open to doubt in these days of the gospel. That way, the birth of the Savior—which was to exceed all wonders and the whole measure of human intelligence—would engender in us a faith all the more steadfast, the more often and the earlier it had been proclaimed beforehand.
No, indeed, it is not that God has just recently come up with a plan for attending to human affairs, nor that it has taken him this long to show compassion. Rather, he laid down from the very “foundation of the world” one and the same “cause of salvation” for all. For the grace of God—by which the entire assembly of saints has always been justified—was not initiated at the time when Christ was born, but augmented. This “mystery of great compassion,” with which the whole world has now been filled, was so powerful even in its prefigurations that those who believed it when promised attained to it no less than those who received it when actually given.

SERMON 23.3-4

Hebrews 7:1

We therefore confess, dearly beloved, not rashly but with faith, that the Lord Jesus Christ is present in the midst of believers. Although he “sits at the right hand” of God the Father “until he makes of his enemies a footstool,” the high priest has not left the assembly of his priests.Fittingly does this chant rise up to him from the mouth of the whole church and from that of all priests, “The Lord has sworn, and he will not change his mind, ‘You are a priest forever after the order of Melchizedek.’ ” He himself is the true and eternal bishop whose ministry can neither change nor end. He is the one prefigured by the high priest Melchizedek.
Attached to oaths among human beings are certain conditions that have been made irrevocable by permanent guarantees. Surety for the divine oath can therefore be found in promises that have been fixed by immutable decrees. Since regret implies a change of will, God does not regret what, according to his eternal good pleasure, he cannot want to be otherwise than how he has wanted it.

SERMON 5.3

Hebrews 7:11-12

When I compare the impoverishment of my insufficiency with the greatness of the gift I have received, I too should cry out in those words of the prophet, “Lord, I have heard your word and was afraid; I have considered your works and trembled.” What indeed could instill as much anxiety and fear as labor for the frail, elevation for the lowly, dignity for the undeserving? Yet we do not despair or give up, since we do not depend on ourselves but on the one “who works in us.” … So we have chanted with one voice the psalm of David, dearly beloved, not for our own exaltation but for the glory of Christ the Lord.He it is of whom it was said in prophetic manner, “You are a priest for ever after the order of Melchizedek,” that is to say, “not according to the order of Aaron,” whose priesthood passed down through the descent of his offspring and was a temporary ministry that ceased with the law of the Old Testament, but “after the order of Melchizedek,” in whom the office of eternal high priest was prefigured. Since there is no mention of the parents he came from, he must be understood as stan…

When I compare the impoverishment of my insufficiency with the greatness of the gift I have received, I too should cry out in those words of the prophet, “Lord, I have heard your word and was afraid; I have considered your works and trembled.” What indeed could instill as much anxiety and fear as labor for the frail, elevation for the lowly, dignity for the undeserving? Yet we do not despair or give up, since we do not depend on ourselves but on the one “who works in us.” … So we have chanted with one voice the psalm of David, dearly beloved, not for our own exaltation but for the glory of Christ the Lord.He it is of whom it was said in prophetic manner, “You are a priest for ever after the order of Melchizedek,” that is to say, “not according to the order of Aaron,” whose priesthood passed down through the descent of his offspring and was a temporary ministry that ceased with the law of the Old Testament, but “after the order of Melchizedek,” in whom the office of eternal high priest was prefigured. Since there is no mention of the parents he came from, he must be understood as standing for the one “whose genealogy cannot be told.”
Finally, since the mystery of this divine priesthood also extends to its implementation by people, it does not pass down through the course of generations. It is not what flesh and blood have created that is chosen. Rather, the privileges of paternity give way, and the social positions of families are disregarded, as the church accepts for its rulers those whom the Holy Spirit has prepared. Among the people of God’s adoption, which is priestly and kingly when taken as a whole, the prerogative of earthly lineage does not obtain the anointing.

SERMON 3.1

Hebrews 8:6-9

[The Lord] ascended into the retirement of a neighboring mountain and called his apostles to him there. From the height of that mystical seat he could instruct them in the loftier doctrines, signifying from the very nature of the place and act that it was he who had once honored Moses by speaking to him. He spoke with Moses then, indeed, with a more terrifying justice, but now with a holier mercy in order that what had been promised might be fulfilled when the prophet Jeremiah says, “Behold, the days are coming when I will complete a new covenant for the house of Israel and for the house of Judah. After those days, says the Lord, I will put my laws in their minds, and in their heart will I write them.” He therefore who had spoken to Moses, spoke also to the apostles, and the swift hand of the Word wrote and deposited the secrets of the new covenant in the disciples’ hearts. There were no thick clouds surrounding him as of old, nor were the people frightened off from approaching the mountain by frightful sounds and lightning. Rather, quietly and freely his discourse reached the ears o…

[The Lord] ascended into the retirement of a neighboring mountain and called his apostles to him there. From the height of that mystical seat he could instruct them in the loftier doctrines, signifying from the very nature of the place and act that it was he who had once honored Moses by speaking to him. He spoke with Moses then, indeed, with a more terrifying justice, but now with a holier mercy in order that what had been promised might be fulfilled when the prophet Jeremiah says, “Behold, the days are coming when I will complete a new covenant for the house of Israel and for the house of Judah. After those days, says the Lord, I will put my laws in their minds, and in their heart will I write them.” He therefore who had spoken to Moses, spoke also to the apostles, and the swift hand of the Word wrote and deposited the secrets of the new covenant in the disciples’ hearts. There were no thick clouds surrounding him as of old, nor were the people frightened off from approaching the mountain by frightful sounds and lightning. Rather, quietly and freely his discourse reached the ears of those who stood by. In this way the harshness of the law might give way before the gentleness of grace, and “the spirit of adoption” might dispel the terrors of bondage.

SERMON 95.1

Hebrews 11:1-3

Rejoice that whatever the shadows of the Old Testament used to veil beneath the testimonies of prophets has been brought out into the open through the mystery of the Lord’s passion. As a result, the various kinds of sacrifices and the different means of purification have come to a halt. Thus, the precept of circumcision, the distinction between foods, the sabbath rest, and the killing of the paschal lamb have ceased, since “the law was given through Moses, but grace and truth came through Jesus Christ.”Figures came first so that their fulfillment could follow. When the reality which had been announced finally arrived, there was no longer any need for the services of heralds. Reconciliation of the human race was conducted in such a way that the salvation which comes in Christ should have been available to all generations under the same justification. Delaying this salvation was a calculated move. It had the advantage of causing those things which were believed long before they actually took place to be honored without interruption. When the strength of faith has been established in th…

Rejoice that whatever the shadows of the Old Testament used to veil beneath the testimonies of prophets has been brought out into the open through the mystery of the Lord’s passion. As a result, the various kinds of sacrifices and the different means of purification have come to a halt. Thus, the precept of circumcision, the distinction between foods, the sabbath rest, and the killing of the paschal lamb have ceased, since “the law was given through Moses, but grace and truth came through Jesus Christ.”Figures came first so that their fulfillment could follow. When the reality which had been announced finally arrived, there was no longer any need for the services of heralds. Reconciliation of the human race was conducted in such a way that the salvation which comes in Christ should have been available to all generations under the same justification. Delaying this salvation was a calculated move. It had the advantage of causing those things which were believed long before they actually took place to be honored without interruption. When the strength of faith has been established in those things that do not lie open to our vision, heavenly doctrine treats us more leniently.… To help us understand more easily, we benefit from many more prophets and witnesses than former ages.

SERMON 69.2

Hebrews 11:5-6

A sound faith is a mighty bulwark, a true faith to which nothing has to be added or taken away. Unless it is one, it is no faith, as the apostle says, “one Lord, one faith, one baptism, one God and Father of all, who is above all, and through all, and in us all.” Cling to this unity, dearly beloved, with minds unshaken, and “follow after” all “holiness” in faith. Carry out the Lord’s commands in faith because “without faith it is impossible to please God.” Without faith nothing is holy, nothing is pure, nothing alive: “for the just lives by faith.” The one who, by the devil’s deception, loses it is dead even though he is living because, as righteousness is gained by faith, so too by a true faith eternal life is gained. This is exactly what our Lord and Savior says, “And this is life eternal, that they may know you, the only true God, and Jesus Christ, whom you have sent.” May he make you to advance and persevere to the end, who lives and reigns with the Father and the Holy Spirit, forever and ever. Amen.

SERMON 25.6

Hebrews 13:11-14

“Christ, our paschal lamb, has been sacrificed,” as the apostle says. Offering himself to the Father as a new and real sacrifice of reconciliation, he was crucified—not in the temple whose due worship is now completed, nor within the enclosure of the city which was to be destroyed because of its crime, but “outside the camp.” That way, as the mystery of the ancient sacrifices was ceasing, a new victim would be put on a new altar, and the cross of Christ would be the altar not of the temple, but of the world.

SERMON 59.5

Isaiah 1:13

When, from the teaching of ancient doctrine, dearly beloved, we undertake the fast of September to purify our souls and bodies, we are not subjecting ourselves to legal burdens. We are embracing the good use of self-restraint that serves the gospel of Christ. In this too, Christian virtue can “exceed that of the scribes and Pharisees,” not by making void the law but by rejecting worldly wisdom.

SERMON 92:2

Isaiah 9:2

Although he filled all things with his invisible majesty, [Christ] came, nevertheless, to those who had not known him, as if from a very remote and deep seclusion. At that time, he took away the blindness of ignorance, as it has been written: “For those sitting in darkness and in the shadow of death, a light has risen.”

SERMON 25:3

Isaiah 9:6

[Eutyches] might have read the words of the same prophet: “A child is born to us, and a son is given to us, and the government is upon his shoulders: and they shall call his name, angel of the Great Counsel, God the Mighty, the Prince of peace, Father of the world to come.” And he would not speak nonsense, saying that the Word was made flesh in such a way that Christ, born from the Virgin’s womb, had a man’s form yet did not have the reality of his mother’s body.

LETTER 28

Isaiah 33:6

But, since there are many kinds of treasures and different grounds for joy, each one’s treasure corresponds to the movement of their desire. If it is an appetite for earthly things, it makes those who share in it not happy but wretched. Those who “savor the things above, not what is on earth,” and are not eager for what perishes but for what is eternal, have hidden, incorruptible resources, in that about which the prophet says, “In your treasure is our salvation. There wisdom and knowledge and holiness are from the Lord. These are the treasures of his justice.”Through them, with God’s grace helping us, even earthly goods are transformed into heavenly, as long as many use their wealth, either left them by law or otherwise acquired, as instruments of goodness. When they distribute, from what they can count as overabundance, to the support of the poor, they collect for themselves riches that cannot be lost, so that what they have withdrawn for alms cannot be credited to expense, and they properly keep their heart where they have “their treasure.” It is most blessed to use wealth of this…

But, since there are many kinds of treasures and different grounds for joy, each one’s treasure corresponds to the movement of their desire. If it is an appetite for earthly things, it makes those who share in it not happy but wretched. Those who “savor the things above, not what is on earth,” and are not eager for what perishes but for what is eternal, have hidden, incorruptible resources, in that about which the prophet says, “In your treasure is our salvation. There wisdom and knowledge and holiness are from the Lord. These are the treasures of his justice.”Through them, with God’s grace helping us, even earthly goods are transformed into heavenly, as long as many use their wealth, either left them by law or otherwise acquired, as instruments of goodness. When they distribute, from what they can count as overabundance, to the support of the poor, they collect for themselves riches that cannot be lost, so that what they have withdrawn for alms cannot be credited to expense, and they properly keep their heart where they have “their treasure.” It is most blessed to use wealth of this kind that it may grow, and not fear lest it be destroyed.

SERMON 92:3

Isaiah 35:5

“God was in Christ reconciling the world to himself,” and the Creator himself was wearing the creature which was to be restored to the image of its Creator. And after the divinely miraculous works had been performed, the performance of which the spirit of prophecy had once predicted, “then shall the eyes of the blind be opened and the ears of the deaf shall hear; then shall the lame man leap like a deer, and the tongue of the dumb shall speak plainly.”

SERMON 54:4

Isaiah 42:16

The apostle John teaches how this is fulfilled: “We know that the Son of God came and gave understanding to us, that we might know the truth and be in his true Son.” And again, “Let us love, therefore, since God first loved us.” By loving us, God restores us to be his image, so that he might find the form of his own goodness in us. He grants that we ourselves might work what he works, indeed setting light to our minds and causing us to burn with the fire of his love, in order that we love not only him but also the things that he loves.

SERMON 12:1

Isaiah 53:8

The birth of our Lord and Savior, whether that of his divinity from the Father or that of his flesh from his mother, surpasses the power of human eloquence. As a result, the saying (“Who will recount his generation?”) may rightly be referred to either.

SERMON 30:1