In the depth of winter, I finally learned that within me there lay an invincible summer.

If a man neglects education, he walks lame to the end of his life

I have always regarded myself as the pillar of my life.

Not all things are to be discovered; many are better concealed.

There is nothing more frightful than ignorance in action.

Never be bullied into silence. Never allow yourself to be made a victim. Accept no one's definition of your life; define yourself.

For life in general, there is but one decree: youth is a blunder, manhood a struggle, old age a regret.

Maybe this world is another planet?s hell.

I desire to live in peace and to continue the life I have begun under the motto 'to live well you must live unseen'

A tragedy means always a man's struggle with that which is stronger than man.

Rudeness is the weak man's imitation of strength.

Open your eyes, look within. Are you satisfied with the life you're living?

Life is what happens to you while you're busy making other plans.

There's no advantage to hurrying through life.

Science is the most reliable guide for civilization, for life, for success in the world. Searching a guide other than the science is meaning carelessness, ignorance and heresy.

I was born with an enormous need for affection, and a terrible need to give it.

Life is like a library owned by the author. In it are a few books which he wrote himself, but most of them were written for him.

No social problem is as universal as the oppression of the child

If people do not believe that mathematics is simple, it is only because they do not realize how complicated life is.

Should you find yourself in a chronically leaking boat, energy devoted to changing vessels is likely to be more productive than energy devoted to patching leaks.

The more man meditates upon good thoughts, the better will be his world and the world at large.