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.

 (iv) We may regard our brother man as an enemy. If we regard competition as the principle of life, that is bound to be so. Every other man in the same profession or trade is a potential competitor and, therefore, a potential enemy. 