To laugh often and love much; to win the respect of intelligent persons and the affection of children, to earn the approbation of honest critics; to appreciate beauty; to give of one’s self, to leave the world a bit better, whether by a healthy child, a garden patch or a redeemed social condition; to have played and laughed with enthusiasm and sung with exultation; to know even one life has breathed easier because you have lived–that is to have succeeded.

Unless we think of others and do something for them, we miss one of the greatest sources of happiness.