They went out from us, but they didn't belong to us; for if they had belonged to us, they would have continued with us. But they left, that they might be revealed that none of them belong to us.
 (4) One of the best evidences of true piety is found in the fact of continuing with the church. I do not mean nominally and formally, but really and spiritually, having the heart with the church; loving its peace and promoting its welfare; identifying ourselves with real Christians, and showing that we are ready to cooperate with those who love the Lord Jesus and its cause.