2 Corinthians 6:17

Come out from among them. Isaiah 52:11, which is here quoted, taken literally ordered the Apostles and the faithful generally to come out, not from the unbelieving and unclean city of Babylon, but from Jerusalem, to be laid waste by Titus. But the Apostle, either tropologically or by parity of reasoning, applies it as an injunction to the faithful to avoid too great intimacy with unbelievers, and not to touch the unclean thing, that is unclean unbelievers; not to live with them, lest they stain themselves with their uncleannesses, such as drunkenness, lust, pride, ungodliness, and unrighteousness (Jerome, Cyril in Isa. lii., Chrysostom, Ambrose, Anselm).