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

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

"The wise man proportions his belief to the evidence."

"It is difficult for a man to speak long of himself without vanity; therefore, I shall be short."

"Beauty is no quality in things themselves: It exists merely in the mind which contemplates them; and each mind perceives a different beauty."