LYL 25.3
(Letters to Young Lovers 25.3)
Your acquaintances who are utterly averse to spiritual things, are not refined, ennobled, and elevated by the practice of the truth. They are not under the leadership of Christ, but under the black banner of the prince of darkness. To associate with those who neither fear nor love God—unless you associate with them for the purpose of winning them to Jesus—will be a detriment to your spirituality. If you cannot lift them up, their influence will tell upon you in corrupting and tainting your faith. It is right for you to treat them kindly, but not well for you to love and choose their society; for if you choose the atmosphere that surrounds their souls, you will forfeit the companionship of Jesus. (LYL 25.3) MC VC