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

“In our reasonings concerning matter of fact, there are all imaginable degrees of assurance, from the highest certainty to the lowest species of moral evidence. A wise man, therefore, proportions his belief to the evidence.”

“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.”

“Faith is the commitment of one's consciousness to beliefs for which one has no sensory evidence or rational proof. When man rejects reason as his standard of judgement, only one alternative standard remains to him: his feelings. A mystic is a man who treats his feelings as tools of cognition. Faith is the equation of feelings with knowledge”

“The faith of religion is belief on insufficient evidence.”

“Belief without evidence is the very hallmark of the savage.”