“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.”

“Does a man of sense run after every silly tale of hobgoblins or fairies, and canvass particularly the evidence? I never knew anyone, that examined and deliberated about nonsense who did not believe it before the end of his enquiries.”

“When anyone tells me that he saw a dead man restored to life, I immediately consider with myself whether it be more probable that this person should either deceive or be deceived or that the fact which he relates should really have happened. I weigh the one miracle against the other and according to the superiority which I discover, I pronounce my decision. Always I reject the greater miracle. If the falsehood of his testimony would be more miraculous than the event which he relates, then and not till then, can he pretend to command my belief or opinion.”

“If my life be not my own, it were criminal for me to put it in danger, as well as to dispose of it; nor could one man deserve the appellation of hero, whom glory or friendship transports into the greatest dangers, and another merit the reproach of wretch or misereant who puts a period to his life, from the same or like motives.”

“Be a philosopher, but amid all your philosophy be still a man.”

“But the life of a man is of no greater importance to the universe than that of an oyster.”