No pessimist ever discovered the secrets of the stars…or sailed to an uncharted land…or opened a new heaven to the human spirit.

Do you feel gloomy? Lift your eyes. Stand on your feet. Say a few words of appreciation and love to the lord. Be positive.

The optimist sees the rose and not its thorns; the pessimist stares at the thorns, oblivious of the rose.

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

Satire is a sort of glass, wherein beholders do generally discover everybody's face but their own.

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.

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.

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

Wonder is the mother of all science.

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

If I have ever made any valuable discoveries, it has been owning more to patient attention, than to any other talent.

Man is a universe in little.

Have to and get to—both are choices. One is negative and one is positive. Choose the right one and it can change your life.

I don’t believe in pessimism. If something doesn’t come up the way you want, forge ahead. If you think it’s going to rain, it will.

The positive thinker see the invisible, feels the intangible, and achieve the impossible.

A pessimist is a man who thinks everybody is as nasty as himself, and hates them for it.

To establish true self-esteem, we must concentrate on our successes and forget about the failures and the negatives in our lives.

An optimist may see a light where there is none, but why must the pessimist always run to blow it out?