But he who hates his brother is in the darkness, and walks in the darkness, and doesn't know where he is going, because the darkness has blinded his eyes.

 But for the Christian the cleavage between the world and the Church had another background. The Jews had for many centuries a basic belief which divided time into two ages, this present age, which was wholly evil, and the age to come, which was the age of God and, therefore, wholly good. It was a basic belief of the Christian that in Christ the age to come had arrived; the Kingdom of God was here. But the Kingdom of God had not arrived in and for the world; it had arrived only in and for the Church. Hence the Christian was bound to draw a contrast. The life of the Christian within the Church was the life of the age to come, which was wholly good; on the other hand the world was still living in this present age, which was wholly evil. It followed inevitably that there was a complete cleavage between the Church and the world, and that there could be no fellowship, and even no compromise, between them. 