LYL 26.4
(Letters to Young Lovers 26.4)
If believers associate with unbelievers for the purpose of winning them to Christ, they will be witnesses for Christ, and having fulfilled their mission, will withdraw themselves in order to breathe in a pure and holy atmosphere. When in the society of unbelievers, ever remember that in character you are a representative of Jesus Christ, and let no light and trifling words, no cheap conversation be upon your lips. (LYL 26.4) MC VC