Thou shalt love. The duty of loving - there is nothing of that in the codes of abstract duty. It is impossible to exclude that from its fundamental place in the system of duty whose constant spring is in the fatherhood of God .... Of this quality in duty it is no Christian's place to be ashamed or afraid. None of us may melt it away or sink it out of sight. In its prominence lies the soul of the duty that we do. We may not try to make that duty cold and soulless which has its true being in the central commandment which is its living soul - "Thou shalt love."