Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe.
There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle.
When you are courting a nice girl an hour seems like a second. When you sit on a red-hot cinder a second seems like an hour. That's relativity.
We cannot solve our problems with the same thinking we used when we created them.
The only thing that interferes with my learning is my education.
Few are those who see with their own eyes and feel with their own hearts.
If you can't explain it simply, you don't understand it well enough.
What is inconceivable about the universe is that it is at all conceivable.
It's not that I'm so smart, it's just that I stay with problems longer.
The hardest thing in the world to understand is the income tax.
You see, wire telegraph is a kind of a very, very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? And radio operates exactly the same way: you send signals here, they receive them there. The only difference is that there is no cat.
I have reached an age when, if someone tells me to wear socks, I don't have to.
The process of scientific discovery is, in effect, a continual flight from wonder.
Why is it that nobody understands me and everybody likes me?
I don't know what will be used in the next world war, but the 4th will be fought with stones.
I have no special talents. I am only passionately curious.
Intellectuals solve problems; geniuses prevent them.
Coincidence is God's way of remaining anonymous.
No, this trick won't work... How on earth are you ever going to explain in terms of chemistry and physics so important a biological phenomenon as first love?
Human beings, vegetables, or cosmic dust - we all dance to a mysterious tune, intoned in the distance by an invisible piper.
The only real valuable thing is intuition.
It has become appallingly clear that our technology has surpassed our humanity.
Common sense is the collection of prejudices acquired by age eighteen.
Education is what remains after one has forgotten everything one learned in school.
Reality is merely an illusion, albeit a very persistent one.