You will find as you grow older that the first thing needful to make the world a tolerable place to live in is to recognize the inevitable selfishness of humanity. You demand unselfishness from others, which is a preposterous claim that they should sacrifice their desires to yours. Why should they? When you are reconciled to the fact that each is for himself in the world you will ask less from your fellows. They will not disappoint you, and you will look upon them more charitably. Men seek but one thing in life -- their pleasure.

W. Somerset Maugham