I am a bit confused by the relationship between Avraham and Lot. We view Avraham as the paradigm of kiruv, yet for all his efforts, it seems that Lot remained somewhat estranged. Taking his leave of Avraham, Lot heads to Sdom, a city soon to be destroyed because of its immorality, perhaps indicating his total rebellion against the ways of Avraham. Yet, despite fleeing from Avraham, there is much apparently which Lot did absorb, as we see from his welcoming guests to his home, mimicking Avraham’s behavior (albeit to a lesser degree). Is Lot a rasha fleeing religiosity, a glutton looking no further than the satisfaction of his own desires, or a lost soul in need of more kiruv than even Avraham could provide?
In the prophetic revelation to Avraham at the end of ch 13 the Torah stresses that Hashem’s appearance occurred “acharei hipared Lot mey’imo”, only after Lot’s departure. Rashi writes that as long as “the rasha”, i.e. Lot, remained with Avraham, G-d did not appear to Avraham. I think this harsh condemnation of Lot also highlights Avraham’s extraordinary kiruv efforts. It could not have escaped Avraham’s notice that G-d had ceased to communicate with him while he was in contact with Lot. Yet, Avraham never acted to drive Lot away because of that. Only when Lot’s became a menace to others by engaging in theft did Avraham feel a need to part ways.
Not all the meforshim agree with Rashi’s approach. The Seforno writes that this prophecy occurred to Avraham only after Lot’s departure because the reiteration of the promise of all of Eretz Yisrael to Avraham would only embolden Lot to seize more of their neighbor’s land for himself. Lot is a man with a specific problem that cannot be fed or encouraged, an “addict” to a wrong philosophy, but that does not necessarily mean all prophecy from G-d had ceased because of his presence.