It is still an unending source of surprise for me how a few scribbles on a blackboard or on a piece of paper can change the course of human affairs. -Stanislaw Ulam
Can they really? I have my doubts. Most of those scribbles on a blackboard were either an inevitable result of outside forces or would have been made on a different blackboard had they they not been made there. (Although to be fair the butterfly and mere chance will play their part at least some of the time.)
A monthly thread for posting rationality-related quotes you've seen recently (or had stored in your quotesfile for ages).