(39) Why when he was ninety and nine years old does the sacred writer say, “The Lord God appeared to him and said, I am the Lord thy God?” (#Ge 17:1). He here makes use of both the titles of each superior virtue, applying them in the case of his address to the wise man, because it was by them that all things were created, and by them that the world is regulated after it had been created. By one of them therefore the wise man, just in the same manner as the world itself, was fashioned and made according to the likeness of God; and God is the name of creative virtue; and by the other of them that he was made according to the Lord, as falling under his authority and supreme power. Therefore he designs here to show that the man who is conspicuous in virtue is both a citizen of the world, and also equal in dignity to the whole world, declaring that both the virtues of the world, the divine and the royal attributes, are in a singular manner appointed to and set over him as protectors. And it was with great correctness and propriety that this appearance took place when he was about ninety and nine years old, because that number is very near the hundred. And the number a hundred is composed of the number ten multiplied by itself, which the sacred historian calls the holy of holies. Since the first court, the first ten, is simply called holy, and that is permitted to be entered by the sweepers of the temple; but the ten of tens, which he again enjoins the sweepers of the temple to pay above all things to the existing high priest, is the number ten computed along with the number a hundred, for what else is the tenth of the tenths but the hundredth? However the number ninety and nine has been set forth and adorned not only by its affinity to the number a hundred, but it has also received a particular participation in a wonderful nature, since it consists of the number fifty, and of seven times seven. For the fiftieth year, as the year of Pentecost or the Jubilee, is called remission in the giving forth of the law, as then all things are given their liberty, whether living or inanimate. And the mystery of the seventh year is one of quiet and profound peace to both body and soul. For the seventh is the recollection of all the good things which come of their own accord without industry of labour, which at the first creation of the world nature produced of herself; but the number forty-nine, consisting as it does of seven times seven, indicates no trifling blessings, but rather those which have virtue and wisdom, in such a degree as to contribute to invincible and mighty constancy.

(40) What is the meaning of, “Do thou please me, and keep thyself from stain, and I will make my treaty between me and thee, and I will multiply thee exceedingly?” (#Ge 17:1). God here lays down a law for the human race in a somewhat familiar manner; for he who has no participation in wickedness and is free from evil, will be perfectly good, which is peculiar to incorporeal natures. But those who are in the body are called good in proportion to the measure in which wickedness and the practice of sin are removed from them. Therefore the life of those men has appeared honourable, not that of those who have been free from sickness from the beginning to the end, but that of those who from a state of infirmity have advanced to sanity; on which account he says directly and plainly, “Keep thyself free from stain,” for it is sufficient to conduct a mortal nature to felicity not to be blamed, and neither to do nor say anything deserving of reproof; and such conduct is at once pleasing to the Father. Therefore it is that he said, “Do thou please me, and keep thyself free from stain.” Where the form of expression implies a mutual conversion; since the habits which please God do not deserve reproof, and he who keeps himself free from stain and avoids reproof in all things is altogether pleasing to God. Therefore he promises to bestow a double blessing on him who keeps himself free from all reproof; in the first place, to make him the guardian of the deposits of the divine covenant: and in the second place to cause him to increase to a multitude without any limit. For that expression, “I will make my treaty, or covenant, between me and thee,” shows the office of guardianship of the truth which is entrusted to an honest man; for the whole treaty of God is the incorporeal word; which is the form and measure of the universe according to which this world was made. And then repeating the expression, “I will multiply thee exceedingly,” twice manifestly shows the immense numbers to which the multitude promised shall grow, I mean the increase which shall take place in the people, not in human virtue.