Genesis 13:5

It remains to be seen if Lot too, his nephew, was rich as one who belonged to the same family. But Scripture says only that he had many cattle. In fact, the text reads, "Lot also, who went with Abraham, had flocks, herds and tents." He had no silver, because he was not yet just; in fact, "the tongue of the just man is like silver purified by fire." He had no gold, which was the possession of the one who saw the posterity of Christ, of whom it is written: "And his posterity shines like gold." Abraham saw him, as the Lord testified when he said, "Abraham saw my day and rejoiced." This is why he deserved to shine like gold and to have gold as his endowment.

But Lot also, who was with Abram, had flocks of sheep, and herds, and tents; nor could the land bear them so that they might dwell together: for their substance was great, and they could not dwell together: hence there was a quarrel between the herdsmen of Abram's flocks and Lot's, and it is detailed how Lot departed from Abraham with their love preserved, preferring to separate physically from his dearest and most holy brother rather than to remain with him amidst scandals and disputes, which were troubling the weak ones; yet he in no way let his bodily separation from him separate him from the deepest love of his mind, as the following sacred history most clearly proves: where having been captured by enemies, he saved him with all his might with his men, and rightly so because Lot himself did not at all alter the course of virtue and faith, which he had been accustomed to practice with his elder brother, even living apart.

It is impossible for me to omit here a discussion of a question that has stumped even the more learned, namely, why the text is worded this way: "Lot also, who went with Abraham," as though we were to understand that there was another Lot who did not go with him. And many believe the problem is as yet unresolved. So to satisfy these and at the same time to abide by the rule of Scripture, we would say that there is one person who takes on two roles, that in one and the same individual two things are signified. Numerically Lot is a single individual; virtually he is two. In fact, Lot, according to the Latin interpretation, means declinatio ("a deviation"). But one can deviate either from the good or from the bad. So when Lot deviated from the bad, that is, from error, from base and criminal behavior, he was joined to his uncle. When he deviated from the good, that is, from what is just, innocent, holy and sacred, he was joined to baseness. This is why it says, "now Lot too, who accompanied Abraham," because he had not yet chosen Sodom, and he was not dwelling among those who are authors of evil. Thereafter he did go to live in Sodom. And so it was that he became alienated from himself; he thought of himself as of another, as of one, that is, who withdraws not only from the just man but even from himself.