I have just got a new theory of eternity.
I have no special talent. I am only passionately curious.
I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.
I live in that solitude which is painful in youth, but delicious in the years of maturity.
I never think of the future – it comes soon enough.
I shall never believe that God plays dice with the world.
I think and think for months and years. Ninety-nine times, the conclusion is false. The hundredth time I am right.
I used to go away for weeks in a state of confusion.
If people are good only because they fear punishment, and hope for reward, then we are a sorry lot indeed.
If the facts don’t fit the theory, change the facts.
If we knew what it was we were doing, it would not be called research, would it?
If you are out to describe the truth, leave elegance to the tailor.
If you can’t explain it simply, you don’t understand it well enough.
It should be possible to explain the laws of physics to a barmaid.
It stands to the everlasting credit of science that by acting on the human mind it has overcome man’s insecurity before himself and before nature.
It was the experience of mystery – even if mixed with fear – that engendered religion.
It’s not that I’m so smart, it’s just that I stay with problems longer.
Joy in looking and comprehending is nature’s most beautiful gift.
Knowledge of what is does not open the door directly to what should be.
Learn from yesterday, live for today, hope for tomorrow. The important thing is not to stop questioning.
Let every man be respected as an individual and no man idolized.
Logic will get you from A to B. Imagination will take you everywhere.
Look deep into nature, and then you will understand everything better.
Love is a better teacher than duty.