Chap. IV.—8. Petilianus said: "For he who receives faith from the faithless, receives not faith but guilt."
9. Augustine answered: Christ is not faithless, from whom the faithful man receives not guilt but faith. For he believeth on Him that justifieth the ungodly, that his faith may be counted for righteousness.[685]
Chap. V.—10. Petilianus said: "For everything consists of an origin and root; and if it have not something for a head, it is nothing: nor does anything well receive second birth, unless it be born again of good seed."
11. Augustine answered: Why will you put yourself forward in the room of Christ, when you will not place yourself under Him? He is the origin, and root, and head of him who is being born, and in Him we feel no fear, as we must in any man, whoever he may be, lest he should prove to be false and of abandoned character, and we should be found to be sprung from an abandoned source, growing from an abandoned root, united to an abandoned head. For what man can feel secure about a man, when it is written, "Cursed be the man that trusteth in man?"[686] But the seed of which we are born again is the word of God, that is, the gospel. Whence the apostle says, "For in Christ Jesus I have begotten you through the gospel."[687] And yet he allows even those to preach the gospel who were preaching it not in purity, and rejoices in their preaching;[688] because, although they were preaching it not in purity, but seeking their own, not the things which are Jesus Christ's,[689] yet the gospel which they preached was pure. And the Lord had said of certain of like character, "Whatsoever they bid you observe, that observe and do; but do not ye after their works: for they say, and do not."[690] If, therefore, what is in itself pure is preached in purity, then the preacher himself also, in that he is a partner with the word, has his share in begetting the believer; but if he himself be not regenerate, and yet what he preaches be pure, then the believer is born not from the barrenness of the minister, but from the fruitfulness of the word.
Chap. vi.—12. Petilianus said: "This being the case, brethren, what perversity must it be, that he who is guilty through his own sins should make another free from guilt, when the Lord Jesus Christ says, 'Every good tree bringeth forth good fruit, but a corrupt tree bringeth forth evil fruit: do men gather grapes of thorns?[691] And again: 'A good man, out of the good treasure of the heart, bringeth forth good things: and an evil man, out of the evil treasure, bringeth forth evil things.'"[692]
13. Augustine answered: No man, even though he be not guilty through his own sins, can make his neighbour free from sin, because he is not God. Otherwise, if we were to expect that out of the innocence of the baptizer should be produced the innocence of the baptized, then each will be the more innocent in proportion as he may have found a more innocent person by whom to be baptized; and will himself be the less innocent in proportion as he by whom he is baptized is less innocent. And if the man who baptizes happens to entertain hatred against another man, this will also be imputed to him who is baptized. Why, therefore, does the wretched man hasten to be baptized,—that his own sins may be forgiven him, or that those of others may be reckoned against him? Is he like a merchant ship, to discharge one burden, and to take on him another? But by the good tree and its good fruit, and the corrupt tree and its evil fruit, we are wont to understand men and their works, as is consequently shown in those other words which you also quoted: "A good man, out of the good treasure of his heart, bringeth forth good things: and an evil man, out of the evil treasure, bringeth forth evil things." But when a man preaches the word of God, or administers the sacraments of God, he does not, if he is a bad man, preach or minister out of his own treasure; but he will be counted among those of whom it is said, "Whatsoever they bid you observe, that observe and do; but do not ye after their works:" for they bid you observe what is God's, but their works are their own. For if it is as you say, that is, if the fruit of those who baptize consist in the baptized persons themselves; you declare a great woe against Africa, if a young Optatus has sprung up for every one that Optatus baptized.