There's a fine line between genius and insanity. I have erased this line.

Never put off until tomorrow what you can do the day after tomorrow.

Creativity is knowing how to hide your sources

Friends show their love in times of trouble, not in happiness.

Here is the secret of inspiration: tell yourself that thousands and tens of thousands of people, not very intelligent and certainly no more intelligent than the rest of us, have mastered problems as difficult as those that now baffle you.

I love mankind, it's people I can't stand.

I love you not only for what you have made of yourself, but for what you are making of me.

Nothing great was ever achieved without enthusiasm.

Life can only be understood backwards; but it must be lived forwards.

Life is very short, and there's no time for fussing and fighting my friends.