You can’t solve a problem on the same level you created it.
If you can’t explain it simply, you don’t understand it well enough
The question hat drives me hazy: Am I or the others crazy?
Only a life lived for others is a life worthwhile.
Don’t listen to their words, fix your attention on their deeds.
If at first, the idea is not absurd, then there is no hope for it
The truth of a theory is in your mind, not in your eyes.
We cannot despair of humanity, since we are ourselves human beings
The eternal mystery of the world is its comprehensibility.
I have no particular talent. I am merely inquisitive.
God does not care about our mathematical difficulties. He integrates empirically.
Life isn’t worth living, unless it is lived for someone else.