If a man makes himself a worm he must not complain when he is trodden on.

The hand is the visible part of the brain.

Ingratitude is the essence of vileness.

In law a man is guilty when he violates the rights of others. In ethics he is guilty if he only thinks of doing so.

The wise man can change his mind; the stubborn one, never.

TWO THINGS don't have to mean anything, one is music and the other is laughter.

A single line in the Bible has consoled me more than all the books I ever read besides.

Experience without theory is blind, but theory without experience is mere intellectual play.

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

It is never too late to become reasonable and wise.

Great minds think for themselves.

Live your life as though your every act were to become a universal law.

Man must be disciplined, for he is by nature raw and wild.

There can be no doubt that all our knowledge begins with experience.

All perception is colored by emotion.

Give a man everything he wants and at that moment everything is not everything

If justice perishes, human life on Earth has lost its meaning.

We can judge the heart of a man by his treatment of animals.

Always recognize that human individuals are ends, and do not use them as means to your end.