“Generally speaking, the errors in religion are dangerous; those in philosophy only ridiculous.”

“Reason is, and ought only to be the slave of the passions.”

“It is impossible for us to think of any thing, which we have not antecedently felt, either by our external or internal senses.”

“No man ever threw away life while it was worth keeping.”

“It is an absurdity to believe that the Deity has human passions, and one of the lowest of human passions, a restless appetite for applause”

“Explanation is where the mind rests.”

“Supposing is good, but finding out is better.”

“I don't remember Sherlock Holmes ever mentioning what you are supposed to do when you've eliminated everything improbable, and nothing is left.”

“Why "revere" the unknowable? Why not find out what it is?”

“When man will return to nature, nature will return to him.”

“The sky is an enormous man.”

“When the full-grown poet came,Out spake pleased Nature (the round impassive globe, with all its shows of day and night,) saying, He is mine;But out spake too the Soul of man, proud, jealous and unr...”

“Hard work is a prison sentence only if it does not have meaning.”

“I knew right then that I wanted to be a part of something that meaningful. I wanted to have something I was so passionate about that I'd be willing to risk everything for it. I wanted to know that ...”

“Do it with passion or not at all.”