Augustine of Hippo

Regarding patience in not offering resistance, a person is praised who “gives his cheek to him who strikes him and who is filled full with reproach.” Of love to enemies it is said, “If your enemy hunger, feed him; if he thirst, give him drink.” This also is quoted by the apostle. In the psalm, too, it is said, “I was a peacemaker among them who hated peace,” and in many similar passages. In connection also with our imitating God in refraining from taking revenge and in loving even the wicked, there is a passage containing a full description of God in this character, for it is written, “To you alone ever belongs great strength, and who can withstand the power of your arm? For the whole world before you is as a little grain of the balance; yes, as a drop of the morning dew that falls down on the earth. But you have mercy on all, for you can do all things and wink at the sins of people, because of repentance. For you love all things that are and abhorred nothing that you have made; for never would you have made anything if you had hated it. And how could anything have endured, if it had not been your will? or been preserved, if not called by you? But you spare all; for they are yours, O Lord, you lover of souls. For your good Spirit is in all things; therefore chasten little by little those who offend. Warn them by reminding them of the ways in which they have offended, so that learning their wickedness, they may believe in you, O Lord.” Christ exhorts us to imitate this long-suffering goodness of God, who makes the sun to rise on the evil and the good and sends rain on the just and on the unjust; that we may not be careful to revenge but may do good to them who hate us, and so may be perfect, even as our Father in heaven is perfect. From another passage in these ancient books we learn that, by not exacting the vengeance due to us, we obtain the remission of our own sins. By not forgiving the debts of others, we incur the danger of being refused forgiveness when we pray for the remission of our own debts: “He who revenges shall find vengeance from the Lord, and he will surely keep his sin in remembrance. Forgive your neighbor the hurt that he has done to you; so shall your sins also be forgiven when you pray. One person bears hatred against another, and does he seek pardon of the Lord? He shows no mercy to a person who is like himself; and does he ask forgiveness of his own sins? If he who is but flesh nourishes hatred and asks for favor from the Lord, who will entreat for the pardon of his sins?”

“But if a soul should sin or hear the utterance of an oath, and he himself is a witness or sees or knows about it: if he does not make it known, he too will incur sin.” That is, “If he does not make it known, he will incur sin.” The addition of “and” is a common expression in the Scriptures. But this particular meaning, since it is obscure, seems to need an explanation. For it seems to say that a man sins when someone swears falsely in his hearing and he knows that that man is swearing falsely and remains silent. He knows this, if he was a witness to this matter about which an oath was taken, either having seen it or having known about it. That is, in some way he knows it. Either he saw it with his own eyes or the one who swears told him. For thus he could be aware of it. But between fear of this sin and fear of the treachery of men, there often arises no small temptation. For we can call someone back who is prepared to perjure himself by admonishing him or by preventing him from committing so grave a sin. If, however, he does not listen, and he swears in front of us about something that we know is false, a different question arises: should he be exposed—even if, once he is exposed, he comes into danger of death? But Scripture does not say here to whom this wrong should be made known—whether to the one to whom he swears, or to a priest or to someone who not only is unable to proceed against him by imposing a punishment but can even pray for him. It seems to me that one would free oneself even from the bond of sin if he reveals the fact to those who are able to help the perjurer rather than harm him, either by correcting him or by praying to God for him, if he himself uses the remedy of confession.

The church observes the birth of John as in some way sacred.… When we celebrate John's, we also celebrate Christ's.…John is born of an old woman who is barren. Christ is born of a young woman who is a virgin. Barrenness gives birth to John, virginity to Christ. The normal and proper age of parents was lacking with the birth of John. No marital embrace occurred for the birth of Christ. The former is announced in the declaration of the angel. With the angel's annunciation the latter is conceived. That John will be born is not believed, and his father is silenced. That Christ will be born is believed, and he is conceived by faith. First of all faith makes its entry into the heart of the virgin, and there follows fruitfulness in the mother's womb.
And yet, Zechariah used nearly the same words, when the angel announced John: "By what shall I know this? For I myself am an old man, and my wife is already advanced in her days," and by holy Mary when the angel announced that she was going to give birth: "How shall this be, since I have no husband?" These are practically the same words.…
Finally, John is born when the daylight begins to diminish and the night begins to grow longer. Christ is born when the night begins to be curtailed and the day begins to increase.

Her virginity also itself was on this account more pleasing and accepted, in that it was not that Christ being conceived in her, rescued it beforehand from a husband who would violate it, Himself to preserve it; but, before He was conceived, chose it, already dedicated to God, as that from which to be born. This is shown by the words which Mary spoke in answer to the Angel announcing to her her conception; "How," says she, "shall this be, seeing I know not a man?" Which assuredly she would not say, unless she had before vowed herself unto God as a virgin. But, because the habits of the Israelites as yet refused this, she was espoused to a just man, who would not take from her by violence, but rather guard against violent persons, what she had already vowed. Although, even if she had said this only, "How shall this take place?" and had not added, "seeing I know not a man," certainly she would not have asked, how, being a female, she should give birth to her promised Son, if she had married with purpose of sexual intercourse. She might have been bidden also to continue a virgin, that in her by fitting miracle the Son of God should receive the form of a servant, but, being to be a pattern to holy virgins, lest it should be thought that she alone needed to be a virgin, who had obtained to conceive a child even without sexual intercourse, she dedicated her virginity to God, when as yet she knew not what she should conceive, in order that the imitation of a heavenly life in an earthly and mortal body should take place of vow, not of command; through love of choosing, not through necessity of doing service. Thus Christ by being born of a virgin, who, before she knew Who was to be born of her, had determined to continue a virgin, chose rather to approve, than to command, holy virginity. And thus, even in the female herself, in whom He took the form of a servant, He willed that virginity should be free.

(Epist. ad Dardanum 57.) But in order to say this, as the Evangelist has premised, she was filled with the Holy Spirit, by whose revelation undoubtedly she knew what that leaping of the child meant; lamely, that the mother of Him had come unto her, whose forerunner and herald that child was to be. Such then night be the meaning of so great an event; to be known indeed by grown up persons, but not understood by a little child; for she said not, "The babe leaped in faith in my womb," but leaped for joy. Now we see not only children leaping for joy, but even the cattle; not surely from any faith or religious feeling, or any rational knowledge. But this joy was strange and unwonted, for it was in the womb; and at the coming of her who was to bring forth the Saviour of the world. This joy, therefore, and as it were reciprocal salutation to the mother of the Lord, was caused (as miracles are) by Divine influences in the child, not in any human way by him. For even supposing the exercise of reason and the will had been so far advanced in that child, as that he should be able in the bowels of his mother to know, believe, and assent; yet surely that must be placed among the miracles of Divine power, not referred to human examples.