If the only tool you have is a hammer, you tend to see every problem as a nail.

Any authentic creation is a gift to the future.

The significant problems we have cannot be solved at the same level of thinking with which we created them.

The really valuable thing is intuition.

Discovery is not a work of logical thought, even if the final product is bound in logical form.

One can organize to apply a discovery already made, but not to make one. Only a free individual can make a discovery…Can you imagine an organization of scientists making the discoveries of Charles Darwin?

There is not the slightest indication that nuclear energy will ever be obtainable. It would mean that the atom would have to be shattered at will.

Intuitive powers played a central role in my scientific work; not wild speculation, yet a valued resource when no other approach was available.

I have just got a new theory of eternity.

The years of anxious searching in the dark, with their intense longing, their alternations of confidence and exhaustion, and the final emergence into the light – only those who have experienced it can understand it.

The process of scientific discovery is, in effect, a continual flight from wonder.

Things should be made as simple as possible, but not any simpler.

People like us, who believe in physics, know that the distinction between past, present, and future is only a stubborn, persistent illusion.

You can never solve a problem on the level on which it was created.

One can have the clearest and most complete knowledge of what is, and yet not be able to deduce from that what should be the goal of our human aspirations.

Discovery consists of seeing what everybody has seen and thinking what nobody has thought.