“Bad can be taught at least as efficiently as good. Education is a strong force, but for either good or evil.”

:Richard Feynman in The Value of Science in What Do You Care What Other People Think?

“… we scientists are used to this, and we take it for granted that it is perfectly consistent to be unsure, that it is possible to live and not know.”

:Richard Feynman in The Value of Science in What Do You Care What Other People Think?

“For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.”

:Richard Feynman in Appendix F in What Do You Care What Other People Think?

“When playing Russian roulette, the fact that the first shot got off safely is of little comfort for the next.”

:Richard Feynman in Appendix F in What Do You Care What Other People Think?

“My Father had the spirit and integrity of a scientist, but he was a salesman. I remember asking him the question “How can a man of integrity be a salesman?””

:Richard Feynman in Afterthoughts in What Do You Care What Other People Think?