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.

The universal and lasting establishment of peace constitutes not merely a part, but the whole final purpose and end of the science of right as viewed within the limits of reason.

Reason can never prove the existence of God.

Happiness, though an indefinite concept, is the goal of all rational beings

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.

Laws always lose in energy what the government gains in extent.

He who is cruel to animals becomes hard also in his dealings with men. We can judge the heart of a man by his treatment of animals.