I'll give you a definite maybe.

-Goldwyn, Sam(uel) originally  Schmuel Gelbfisz
Attributed. Quoted in  A Scott Berg Goldwyn (1989).

Philosophy is to be studied, not for the sake of any definite answers to its questions, since no definite answerscan, asa rule, be knowntobetrue, but rather for the sake of the questions themselves; because these questions enlarge our conception of what is possible, enrich our intellectual imagination, and diminish the dogmatic assurance which closes the mind against speculation; but above all because, through the greatness of the universe which philosophy contemplates, the mind also is rendered great, and becomes capable of that union with the universe which constitutes its highest good.

-Russell, Bertrand Arthur William Russell, 3rd Earl
  The Problems of Philosophy, ch.14.

Iown Ilike definiteforminwhat myeyesaretorest upon; and if landscapes were sold, likethe sheets of characters of my boyhood, one penny plain and twopence coloured, I should go the length of twopence every day of my life.

-Stevenson, Robert Louis
  Travels with a Donkey,'FatherApollinaris'.