Man, unlike the animals, has never learned that the sole purpose of life is to enjoy it.
Samuel ButlerThere are two classes [of scientists], those who want to know, and do not care whether others think they know or not, and those who do not much care about knowing, but care very greatly about being reputed as knowing.
Samuel ButlerAll animals, except man, know that the principal business of life is to enjoy it - and they do enjoy it as much as man and other circumstances will allow.
Samuel Butler