“I'm for open-mindedness and tolerance. I'm against any form of fanaticism, fundamentalism or zealotry, and this certainty of 'We have the truth.' The truth is far too large and complex. Nobody has the truth.”

“...nobody can stand truth if it is told to him. Truth can be tolerated only if you discover it yourself because then, the pride of discovery makes the truth palatable.”

“I'm not mean, I'm honest. Nobody is ever straightforward. But sometimes people need to hear the truth.”

“I'm planning, you see, to try to confine myself to the truth. That's hard for an old, inveterate fantasy martyr and liar who has never hesitated to give truth the form he felt the occasion demanded. ”

“Our aim as scientists is objective truth; more truth, more interesting truth, more intelligible truth. We cannot reasonably aim at certainty. Once we realize that human knowledge is fallible, we realize also that we can never be completely certain that we have not made a mistake.”

“There is no 'the truth,' 'a truth'--truth is not one thing, or even a system. It is an increasing complexity.”