I cannot believe that the purpose of life is to be "Happy". I think the purpose of life is to be useful, to be responsible, to be compassionate. It is, above all, to matter: to count, to stand for something, to have made some difference that you have lived at all.
In the dark colony of night, when I consider man's magnificent capacity for malice, madness, folly, envy, rage, and destructiveness, and I wonder whether we shall not end up as breakfast for newts and polyps, I seem to hear the muffled cries of all the words in all the books with covers closed.