You can discover what your enemy fears most by observing the means he uses to frighten you.

We call first truths those we discover after all the others.

Man is a universe in little.

Man can learn nothing unless he proceeds from the known to the unknown.

The poets and philosophers before me discovered the unconscious; what I discovered was the scientific method by which the unconscious can be studied.

The greatest revolution of our generation is the discovery that human beings, by changing the inner attitudes of their minds, can change the outer aspects of their lives.

I went to the woods because I wished to live deliberately, to front only the essential facts of life, and see if I could not learn what it had to teach, and not, when I came to die, discover that I had not lived.

Should I keep back my opinions at such a time, through fear of giving offense, I should consider myself as guilty of treason towards my country, and of an act of disloyalty toward the Majesty of Heaven, which I revere above all earthly kings.

The chief danger in life is that you may take too many precautions.

Think not disdainfully of death, but look on it with favor; for even dearth is one of the things that Nature wills.

The more I traveled the more I realized that fear makes strangers of people who should be friends.

He who fears he shall suffer, already suffers what he fears.

I've had a lot of worries in my life, most of which never happened.

If a man will begin with certainties, he shall end in doubts; but if he will be content to begin with doubts he shall end in certainties.

If you know the enemy and know yourself you need not fear the results of a hundred battles.