I believe that the sum total of the energy of mankind is not to bring us down but to lift us up, and that is the result of the definite, if unconscious, working of the law of love. The fact that mankind persists shows that the cohesive force is greater than the disruptive force, centripetal force greater than centrifugal.
All love is expansion, all selfishness is contraction. Love is therefore the only law of life. He who loves lives, he who is selfish is dying. Therefore love for love's sake, because it is the only law of life, just as you breathe to live.