I could never be talked into believing that all a fish knows is hunger and fear.   I have tried to feel nothing but hunger and fear and don't see how a fish could ever grow to six inches if that were all he ever felt.

Norman Maclean, A River Runs Through It, pg. 19

That's how you know when you have thought too much--when you become a dialogue between You'll probably lose, and You're sure to lose.

Norman Maclean, A River Runs Through It, pg. 18