It is useless to prate and prattle of altruistic motives when the essential motive imposed on us by Nature is self-interest. Every man has a complete right to be selfish. Trouble arises only when he hurts others in order to fulfil this aim. Then the same Nature which prompted him to concentrate on his own existence will punish him. For the law of compensation cannot be evaded: that which we have given to others, of woe or good, will some day be reflected back to us.
-- Notebooks Category 6: Emotions and Ethics > Chapter 1: Uplift Character > # 394