A person who can think is truly a person with boundless power.

——Balzac

People must have three minds, one born from birth, one from books, and one from life.

——Montaigne

Ideology-the free spirit.

——Shakespeare

Without freedom of thought, there is no science and no truth.

——Le Nan

Wise men are guided by reason, ordinary people are guided by experience; and beasts are guided by intuition.

——Cicero

The most rare courage is the courage of thought.

——France

Our life is like execution, and thought is the guide; without a guide, everything will stop. Purpose is lost and strength evaporates.

——Goethe

Thoughts are the property of those who enjoy them.

——Emerson

He who kills his ideas is the greatest murderer.

——Romain Rolland

One should strive to think a lot rather than know a lot.

——Democritus

It takes extraordinary thought to analyze the obvious.

——Whitehead

Thoughts, like love and death, cannot be replaced by others.

——Rostan