Enlightenment is the liberation of man from his self-caused state of minority... Supere aude! Dare to use your own understanding!is thus the motto of the Enlightenment.

Have patience awhile; slanders are not long-lived. Truth is the child of time; erelong she shall appear to vindicate thee.

The death of dogma is the birth of morality.

The greatest human quest is to know what one must do in order to become a human being.

The science of mathematics presents the most brilliant example of how pure reason may successfully enlarge its domain without the aid of experience

It is through good education that all the good in the world arises.

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.