Immanuel Kant — "The concept of freedom is the keystone of the whole edifice of a system of pure …"

"Two things fill the mind with ever new and increasing admiration and awe, the more often and more steadily one reflects on them: the starry heavens above me and the moral law within me."

"Autonomy of the will is the supreme principle of morality."

"The Negro can be disciplined and cultivated, never however genuinely civilized. He lapses from himself into savagery [Wildheit]."

"Space and time are not properties of things in themselves, but forms of our intuition."

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