There is nothing higher than reason.

Reason must approach nature in order to be taught by it. It must not, however, do so in the character of a pupil who listens to everything that the teacher chooses to say, but of an appointed judge who compels the witness to answer questions which he has himself formulated.

Nothing is divine but what is agreeable to reason.

All thought must, directly or indirectly, by way of certain characters, relate ultimately to intuitions, and therefore, with us, to sensibility, because in no other way can an object be given to us.

Every human being should always be treated as an end and never as a mere instrument.

Science is organized knowledge. Wisdom is organized life.

Better the whole people perish than that injustice be done