The purpose of life: R.W.Emerson

“The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.”
-- Ralph Waldo Emerson 

I am not sure I agree with Ralph.  Surely being useful, honorable, and compassionate will yield happiness. While being happy may not be the purpose of life, it is surely an outcome of a life well lived.