"To love is to suffer. To avoid suffering one must not love. But then one suffers from not loving. Therefore to love is to suffer. Not to love is to suffer. To suffer is to suffer. To be happy is to love. To be happy, then, is to suffer. But suffering makes one unhappy. Therefore to be unhappy one must love, or love to suffer, or suffer from too much happiness. I hope you're getting this down."
(From "Love and Death", by Woody Allen)

found at ailujulia.