I'm not sure I'm adult yet.

The universe we observe has precisely the properties we should expect if there is, at bottom, no design, no purpose, no evil, no good, nothing but blind, pitiless indifference

When we do the best that we can, we never know what miracle is wrought in our life, or in the life of another.

We think too much and feel too little.

If you have zest and enthusiasm, you attract zest and enthusiasm. Life does give back in kind.

Is it progress if a cannibal uses a fork?

A mother takes twenty years to make a man of her boy, and another woman makes a fool of him in twenty minutes.

Someone's sitting in the shade today because someone planted a tree a long time ago.

All my life I used to wonder what I would become when I grew up. Then, about seven years ago, I realized that I was never going to grow up - that growing is an ever ongoing process.

Insanity in individuals is rare - but in groups, parties, nations, and epochs, it is the rule.

Exceptional claims demand exceptional evidence.

Love is like an hourglass, with the heart filling up as the brain empties

Your belief in God is merely an escape from your monotonous, stupid and cruel life.

We're born alone, we live alone, we die alone. Only through our love and friendship can we create the illusion for the moment that we're not alone.

Most people treat the present moment as if it were an obstacle that they need to overcome. Since the present moment is life itself, it is an insane way to live.

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.

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

Wrinkles should merely indicate where the smiles have been.

It is not the length of life, but the depth.

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

Each man should frame life so that at some future hour fact and his dreaming meet.