Doubt must be no more than vigilance, otherwise it can become dangerous.

You never know what life is like, until you have lived it.

Consistency is contrary to nature, contrary to life. The only completely consistent people are the dead.

You have to go on and be crazy. Craziness is like heaven.

The natural world is the greatest source of excitement. The greatest source of visual beauty. It is the greatest source of so much in life that makes life worth living.

Some people are desperately looking for scapegoats, they just don't want to see the truth!

Every time I see an adult on a bicycle, I no longer despair for the future of the human race.

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

I am not young enough to know everything.

Man is born free and everywhere he is in chains.

Life is an ongoing process of choosing between safety (out of fear and need for defense) and risk (for the sake of progress and growth). Make the growth choice a dozen times a day.

Everyone seems to have a clear idea of how other people should lead their lives, but none about his or her own.

I don't mind living in a man's world, as long as I can be a woman in it.

Is it progress if a cannibal uses a fork?

We can never judge the lives of others, because each person knows only their own pain and renunciation. It's one thing to feel that you are on the right path, but it's another to think that yours is the only path.

Being ignorant is not so much a shame, as being unwilling to learn.

There's place and means for every man alive.

A lie told often enough becomes the truth.

love the life you live.live the life you love.

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.

There is one common struggle against those who have appropriated the earth, the money, and the machines.