Kempis on: Shunning Over-Familiarity
1 Corinthians 5:9-13 I wrote you in my letter not to associate with immoral people, not at all referring to the immoral of this world or the greedy and robbers or idolaters; for you would then have to leave the world. But I now write to you not to associate with anyone named a brother, if he is immoral, greedy, an idolater, a slanderer, a drunkard, or a robber, not even to eat with such a person. For why should I be judging outsiders? Is it not your business to judge those within ? God will judge those outside. “Purge the evil person from your midst.” (my emphasis)