Job 38:5

15. Lines of measures are stretched forth in the partition of lands, in order that fairness of dimension may be observed by their very extension. But the Lord, coming to the Church in the flesh, measured out the measures of the earth with lines, because He marked out the boundaries of the Church with the subtlety of His secret judgment. The secret measures or lines of this earth were being stretched out, when holy preachers were called by the agency of the Spirit to go into some parts of the world, but were kept from approaching other parts. For when Paul the Apostle was neglecting to preach in Macedonia, a man of Macedonia appeared to him in a vision, to say, Come over into Macedonia and help us. [Acts 16, 9] But on the other hand, as it is written, The Apostle essayed to go into Bithynia, but the Spirit of Jesus suffered them not. [ibid. 7] When holy preachers then are called to Macedonia, and are kept from going into Asia, this line of secret measure is drawn on that side, and removed from this. It is extended there, that Macedonia may be brought within the limits of Holy Church. It is drawn in from hence, that Asia may be left without the bounds of the faith. For there were then some therein who were not to be gathered in: but, when they had been lost according to their desert, Asia has now been embraced within the measures of the Church, by the bounty of God.
16. Within these measures then are all the Elect, without them are all the reprobate, even if they seem to be within the limit of faith. Whence it is written in the Apocalypse; The court which is without the temple, cast out, and measure it not. [Rev. 11, 2] For what else does the court signify but the breadth of the present life? And they who are designated by the court are rightly without the temple: and they are therefore not to be measured, because narrow the gate that leadeth unto life; [Matt. 7, 14] and the breadth of the life of the wicked is not admitted to the measures and rules of the Elect. These spiritual lines were being stretched in hidden judgment, when to a certain person who said, Master, I will follow thee whithersoever thou goest, [Matt. 8, 19] it was replied by the voice of the same Master, The foxes have holes, and the birds of the air nests, but the Son of Man hath not where to lay His head. [ibid. 20] Those measures and lines were being stretched forth, when to a certain person who said, Lord, suffer me to go and bury my father, [Luke 9, 59] it was replied by the voice of the same Master, Let the dead bury their dead, but go thou and preach the kingdom of God. [ibid. 60] Lo! one promises that he will follow Him, and is rejected; another demands to be released, and is retained. Whence is this? Except that the lines of heavenly judgments were being stretched over the hidden spaces of the heart, in order that their incomprehensible measures might enclose the one within, and that the other might, not unjustly, remain without. But since no one is ignorant that God stretches forth these lines of hidden judgments, why is it said to Job, Tell Me, if thou hast understanding, who hath placed the measures of it, if thou knowest? or who hath stretched the line upon it? Is the question put to remind him of that which he might know, and yet forget; that he should consider more anxiously the weight of the secrets of God, namely, that the ordering of man depends not on human strength, but on the power [‘manu’] of the Creator, that so, while considering Who is invisibly performing these works, he may attribute nothing to himself, and no longer attempt any thing of himself, when he dreads the secret judgments of God? But that, considering the measures and lines incomprehensibly stretched out from above, he may remain more firm in the humility of fear, the more he sees every thing depending on the power of the Measurer.

In the holy Scriptures the foundations represent the preachers. The Lord first put them in the church, and on them the structure of the building was developed. That is the reason why the priest, by entering the tabernacle, had to wear twelve stones on his breast, because our high priest, who offers himself for us, giving us from the beginning firm preachers, wore twelve stones under his head in the upper part of his body. And so the holy apostles are the stones that constitute the main ornament of the breast and are the foundations that make the building firm on the ground.… When holy Scripture does not speak of different foundations but of a single foundation, it refers to the Lord himself, who supports our weak and fickle hearts with the power of his divinity.

26. For a line is stretched over this earth, when the examples of preceding Fathers are pointed out to each Elect soul, as a rule of life to be adopted; in order for it to consider from their life what to maintain in its own doings; that so, by observing the track of the proper path, it may neither, through neglect, fall short of the smallest matters, nor, through pride, stretch forth beyond the greatest; nor endeavour to do less than it is able, nor grasp at more than it has received; lest it should either not attain to the measure which it ought, or should, by forsaking this measure, fall beyond its limit. For narrow in truth is the gate which leadeth to life, [Matt. 7, 14] and he enters therein, who is, on account of it, carefully confined in all his doings, by his subtlety of discernment. For he who with fearless mind spreads himself abroad through his own wishes, condemns himself to exclusion from the narrow gate. In order, then, for the measure of this earth to be preserved, a line is extended over it from heaven; because the discriminating life of the Saints is spread out before us in Holy Scripture, in order that, either our defects may be corrected, or our excesses moderated; and both what, and how much, is to be done, is marked out by their discrimination which is set before us.
27. Behold a person, fearing either the loss of goods, or bodily affliction, dreads the threats of worldly power, and presumes not to maintain the truth against the might of opponents. Because Peter beholds him hard pressed with fear, he brings him back to the wide space of virtue, by putting before him the line of his examples. For when he had been scourged by the chiefs of the people, and perceived that he had been set free, on condition that he should cease from preaching, when he was commanded not to speak for the future, he did not yield even for the time. [Acts 4, 18; 5, 40] For he immediately answered and said, We ought to obey God rather than men. [Acts 5, 29] And again, For we cannot but speak the things which we have seen and heard. [Acts 4, 20] But he, who before was weak, and fearing present loss, when he contemplates examples of such great courage, now follows the course of Peter, through the authority of the word, now fears not any adversity, and contemns, even with laceration of body, the powers of the world, which oppose God. But yet the more he overcomes the strength of his persecutors by bold endurance, and the more, in the midst of adversities, he yields not to any terms, the more does he in general set himself above others, even in the opinions he has held, when placed among the faithful; the more does he choose his own schemes, and trust himself, rather than others. He doubtless, while exerting himself in virtue, by not yielding to unrighteous opposition, places his foot beyond the proper limit, by not adopting even the right advice of others. Him does Peter recall within the line of measure, who, after he had overcome the authority of rulers by the freedom of his words, listened, through humility of heart, to Paul’s advice about not circumcising the Gentiles. For he desired so to raise himself up against the adversaries by his authority, as yet not to trust himself in those points in which he was wrong; in order that he might overcome haughty powers by the freedom of his boldness, and might exhibit by the humility of his gentleness submission in good counsel even to his younger brethren; and thus at one time oppose himself to others, and at another together with others oppose himself. In the conduct then of Peter a line of authority and humility is extended as it were before our eyes, lest our mind should not attain to the standard through fear, or should exceed the limit through pride.
28. It has been stated, how the line is extended, lest we should fall into a fault in another case, through the boldness of some of our doings. Let it be now stated how we abandon the line of discretion in one and the same virtue, if we know not how to perform it at one time, and how to defer it at another. For a virtue is not always one and the same thing, for the merits of actions are often changed by circumstances. It is hence the case, that when we are properly engaged in any pursuit, we often more properly desist from it; and that the mind more creditably abandons that employment for a time, in which it was creditably employed at its own proper time. For if in consequence of our lesser virtues, (by performing which we make progress, but by intermitting which we are not endangered,) greater evils and trials threaten our neighbours, we necessarily put aside our advance in virtue, lest we should cause losses to the faith in our weaker neighbours; lest what we do should so far not be a virtue, the more it overthrows the foundations of the faith in the hearts of others, for the sake of itself.
29. Which line of sound judgment Paul rightly extended before the eyes of the beholders, who both ordered the Gentiles who were coming to the liberty of the faith not to be circumcised, [Gal. 5, 2] and yet, when at Lystra, and passing through Iconium, himself circumcised Timothy, who had been born of a Gentile father. [Acts 16, 3] For, seeing that he would excite the rage of the Jews even against those who were then present as his companions, if he did not show that he observed the commands of the letter, he deferred enforcing his assertion, and secured himself and his companions from fierce persecution without loss to the faith. He did that which he ordered not to be done from love to the faith; but he brought back to the service of the faith that which he did as it were unfaithfully. For a virtue is frequently lost, when it is maintained indiscreetly, and when it is discreetly intermitted, it is held the more firmly. And it is no wonder if we understand that that takes place in incorporeal, which we see taking place also in bodily, things. For a bow is intentionally unstrung, in order that at its proper time it may be usefully bent. And if it receives not the rest of being unstrung, it loses its power of striking, from being kept on the stretch. And thus sometimes when a virtue, which is in exercise, is suspended through discretion, it is reserved; in order that it may afterwards strike vices the more powerfully, the more it prudently abstains meanwhile from striking. The subtle line of sound judgment is, therefore, then extended over the earth, when, by setting before each soul the examples of preceding fathers, a virtue is both profitably excited to action, and is sometimes also more profitably restrained.
30. But when boldness of zeal is withdrawn for a while from employment, great consideration is needed, lest we should perchance cease from the exercise of virtue, not from regard to the common good, but through fear for ourselves, or for the sake of some object of ambition. For when this is the case, a man no longer gives way to dispensation, but to sin. Hence when a person so dispenses the work he has undertaken as to cease from virtuous exertion, he must take anxious care, and examine himself first in the depth of his heart, lest he should by this greedily seek something for himself, by this should spare himself alone through fear; and lest the result of his work should turn out ill, as not produced from a proper intention of thought. Whence the Truth well says in the Gospel, The light of thy body is thine eye; if thine eye be single, thy whole body shall be full of light. But if thine eye be evil, thy whole body shall be full of darkness. [Matt. 6, 22. 23.] For what is expressed by the ‘eye,’ except the intention of the heart going before its work? which, before it exercises itself in action, already contemplates that which it desires. And what is designated by the expression ‘body,’ except each single action, which follows its intention as the eye with which it sees? The light of the body, therefore, is the eye, because the merits of an action are enlightened by the ray of good intention. And if thine eye be single, thy whole body shall be full of light, because, if in the singleness of our thought we intend rightly, a good work is produced, even though it seem not good. And if thine eye be evil, thy whole body shall be full of darkness, because, when even any thing that is right is performed from a wrong intention, though it seem brilliant before men, it is yet obscured by the sentence of the inward Judge. Whence it is rightly subjoined, Take heed, therefore, that the light which is in thee be not darkness. If, therefore, the light that is in thee be darkness, how great is that darkness? [Luke 11, 35; Matt 6, 23] Because, if we obscure by bad intention that which we believe we are doing rightly, how great are those evils, which we are ignorant are evils even when we are doing them? And, if we see nothing in that case, when we hold, as it were, the light of discernment, how blindly do we stumble against those sins which we commit without discernment? Through all our doings then our intention must be considered with watchful care, that it choose not, in what it does, any thing temporal, but that it fix itself entirely on the solid foundation of eternity; lest the fabric of our deeds, if built out beyond the foundation, should be rent asunder by the yawning earth.