"It is not contrary to reason to prefer the destruction of the whole world to the scratching of my finger."

"I am apt to suspect the Negroes to be naturally inferior to the Whites. There scarcely ever was a civilized nation of that complexion, nor even any individual eminent either in action or speculation. …"

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

"If we would satisfy ourselves, therefore, concerning the nature of that evidence, which assures us of matters of fact, we must enquire how we arrive at the knowledge of cause and effect."

"The imagination is a great source of error."