Time is not an empirical concept. For neither co-existence nor succession would be perceived by us, if the representation of time did not exist as a foundation a priori.

The existence of the Bible is the greatest blessing which humanity ever experienced.

[R]eason is... given to us as a practical faculty, that is, as one that influences the will.

Humanity is at its greatest perfection in the race of the whites.

A man who has tasted with profound enjoyment the pleasure of agreeable society will eat with a greater appetite than he who rode horseback for two hours. An amusing lecture is as useful for health as the exercise of the body.

Human reason has this peculiar fate that in one species of its knowledge it is burdened by questions which, as prescribed by the very nature of reason itself, it is not able to ignore, but which, as transcending all its powers, it is also not able to answer.

Human beings are never to be treated as a means but always as ends.