"The Negroes and Americans will hence never be capable of founding an orderly civil society for themselves."

"The Hindus always stay children and do not reach the maturity of judgment."

"The greatest human perfection is to perform one's duty."

"All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason."

"All political theories, if they are to be consistent, must proceed from the principle that man is a free and rational being."