On Friendship with unbelievers

All company with unbelievers or misbelievers is not condemned. We find a Lot in Sodom, Israel with the Egyptians, Abraham and Isaac with their Abimelechs; roses among thorns, and pearls in mud; and Jesus Christ among the publicans and sinners. So neither we be infected, nor the name of the Lord wronged, to converse with them that we may convert them, is a holy course. But still we must be among them as strangers: to pass through an infected place is one thing, to dwell in it another. The earth is the Lord's and we are His; wheresoever God shall find the saint, let him be sure to find God in every place.

[See Golden Treasury pp 113, 114]