observation quotes

John Dewey: 

Conflict is the gadfly of thought. It stirs us to observation and memory. It instigates to invention. It shocks us out of sheeplike passivity, and sets us at noting and contriving.

Louis Pasteur: 

In the fields of observation chance favors only the prepared mind.

William S. Burroughs: 

Nothing exists until or unless it is observed. An artist is making something exist by observing it. And his hope for other people is that they will also make it exist by observing it. I call it "creative observation." Creative viewing.

Yogi Berra: 

You can observe a lot just by watching.