“An insane person believes his world is consistent. If hebelieves the government is trying to kill him, he will seeample evidence of his belief in the so-called real world. Hewill be wrong, but his evidence is no better or worse thanyour evidence that it rained this morning. Both of you willbe converting evidence of the present into impressionsstored in your minds and you will both be certain your evidenceis solid and irrefutable. Your mind will mold the factsand shape the clues until it all fits.”

“It is not what the man of science believes that distinguishes him, but how and why he believes it. His beliefs are tentative, not dogmatic; they are based on evidence, not on authority or intuition.”

“To believe in nothing is as ridiculous as to believe in everything. Reason and factual evidence may convert a belief into knowledge.”

“Hope is a state of mind independent of the state of the world. If your heart's full of hope, you can be persistent when you can't be optimistic. You can keep the faith despite the evidence, knowing that only in so doing has the evidence any chance of changing. So while I'm not optimistic, I'm always very hopeful.”

“A wise man apportions his beliefs to the evidence.”

“Before you have faith you must believe, and before you believe there must be evidence of some sort to persuade the mind. Faith is remembering that evidence and holding to it against all that seems to challenge or contradict it.”