Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful.
—Samuel Johnson
Each problem that I solved became a rule which served afterwards to solve other problems.
—Rene Descartes
Men, it has been well said, think in herds; it will be seen that they go mad in herds, while they only recover their senses slowly, and one by one.
—Charles Mackay
Everything has been figured out, except how to live.
—Jean-Paul Sartre
Somewhere, something incredible is waiting to be known.
—Carl Sagan
The opposite of a correct statement is a false statement. But the opposite of a profound truth may well be another profound truth.
—Niels Bohr
A stupid man's report of what a clever man says can never be accurate, because he unconsciously translates what he hears into something he can understand.
—Bertrand Russell
The intelligent man finds almost everything ridiculous, the sensible man hardly anything.
—Johann Wolfgang von Goethe
An atheist has to know a lot more than I know. An atheist is someone who knows there is no god. By some definitions atheism is very stupid.
—Carl Sagan
With insufficient data it is easy to go wrong.
—Carl Sagan in Cosmos
Human beings have a demonstrated talent for self-deception when their emotions are stirred.
—Carl Sagan in Cosmos
Knowledge is the life of the mind.
—Abu Bakr
Everyone lets you down, it’s a fact of life. The key is to know when they’re doing it because they don’t care enough to try not to.
—Kelley York in Hushed
An intellectual is a man who takes more words than necessary to tell more than he knows.
—Dwight D. Eisenhower
Life is always uncertain. We cannot let the fear of what might happen stop us living as we choose.
—Susanna Kearsley in The Rose Garden