It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change.

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

The knowledge of oneself will preserve that person from vanity.

No snowflake in an avalanche ever feels responsible.

To one extent, if you've seen one city slum, you've seen them all.

Life always waits for some crisis to occur before revealing itself at its most brilliant.

Enjoy when you can, and endure when you must.

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

It is easier to influence strong than weak characters in life.

I have no idea what's awaiting me, or what will happen when this all ends. For the moment I know this: there are sick people and they need curing.

The nicest thing for me is sleep, then at least I can dream.

The love of life is necessary to the vigorous prosecution of any undertaking.

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.

I am an American; free born and free bred, where I acknowledge no man as my superior, except for his own worth, or as my inferior, except for his own demerit.

Yesterday is dead, tomorrow hasn't arrived yet. I have just one day, and I'm going to be happy in it.

It is only because of problems that we grow mentally and spiritually.

He who is in love with himself has at least this advantage - he won't encounter many rivals.

Some days you're the bug, some days you're the windshield.

We make up horrors to help us cope with the real ones.

To forget is the secret of eternal youth. One grows old only through memory. There's much too little forgetting.

A man's true character comes out when he's drunk.