Yet not entirely with the fornicators of this world, or with the covetous, or extortioners, or with idolaters; for then must you needs go out of the world.
Read Chapter 5
Ambrosiaster
AD 400
Paul means that it would be better to die than to mix with fellow believers who sin like the fornicator in question, because death would put an end to it sooner rather than later. Commentary on Paul’s Epistles.
Does he mean "to idolaters an idolater? ""to heathens a heathen? ""to the worldly worldly? "But albeit he does not prohibit us from having our conversation with idolaters and adulterers, and the other criminals, saying, "Otherwise ye would go out from the world".
All waves thereof whatsoever suffocate; every eddy thereof sucks down unto Hades. Let no one say, "Who will so safely foreguard himself? We shall have to go out of the world!".
) is the heathen man, who is walking with us along the same road of life which is common to him and ourselves. Now "we must needs go out of the world"