"The existence of matter of fact is not capable of demonstration."

"I am apt to suspect the negroes and in general all other species of men (for there are four or five different kinds) to be naturally inferior to the whites."

"The ingenuity, industry, and activity of the ancient GREEKS have nothing in common with the stupidity and indolence of the present inhabitants of those regions."

"The greatest part of mankind are naturally stupid and ignorant, and consequently owe their submission to the magistrate by the force of custom and education, more than from any sense of their duty or …"

"The sceptic, therefore, still continues to reason and believe, even though he asserts that he cannot defend his reason by reasons."