Every man is to be respected as an absolute end in himself; and it is a crime against the dignity that belongs to him as a human being, to use him as a mere means for some external purpose.

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.

But a lie is a lie, and in itself intrinsically evil, whether it be told with good or bad intents.

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.

Maturity is having the courage to use one's own intelligence!

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

Three things tell a man: his eyes, his friends and his favorite quotes