A life not lived for others is not a life.

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

One man with a gun can control 100 without one.

Work harder on yourself than you do on your job.

In order to seek truth, it is necessary once in the course of our life to doubt, as far as possible, of all things.

Life is not an exact science, it is an art.

No snowflake in an avalanche ever feels responsible.

I've learned that even when I have pains, I don't have to be one.

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

The 'good old times'-all times, when old, are good.

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

All my life through, the new sights of nature made me rejoice like a child.

Quick sensitivity is inseperable from a ready understanding.

I want to feel my life while I'm in it.

Remember that not getting what you want is sometimes a wonderful stroke of luck.

Live for yourself and you will live in vain;Live for others, and you will live again.

In every tragedy, an element of comedy is preserved. Comedy is just tragedy reversed.

Any place I hang my head is home.

The doctor of the future will give no medicine, but will interest her or his patients in the care of the human frame, in a proper diet, and in the cause and prevention of disease.

Most people are other people. Their thoughts are someone else's opinions, their lives a mimicry, their passions a quotation.

As far as we can discern, the sole purpose of human existence is to kindle a light of meaning in the darkness of mere being.