Every sentence I utter must be understood not as an affirmation but as a question.[A caution he gives his students, to be wary of dogmatism.]
The opposite of a correct statement is a false statement. But the opposite of a profound truth may well be another profound truth.
Never express yourself more clearly than you are able to think.
Einstein, stop telling God what to do!
[About describing atomic models in the language of classical physics:]We must be clear that when it comes to atoms, language can be used only as in poetry. The poet, too, is not nearly so concerned wi...
It is not enough to be wrong, one must also be polite.
Your theory is crazy, but it's not crazy enough to be true.
Prediction is very difficult, especially if it's about the future.
The best weapon of a dictatorship is secrecy, but the best weapon of a democracy should be the weapon of openness.
The very nature of the quantum theory ... forces us to regard the space-time coordination and the claim of causality, the union of which characterizes the classical theories, as complementary but excl...
While the finish given to our picture of the world by the theory of relativity has already been absorbed into the general scientific consciousness, this has scarcely occurred to the same extent with t...
Technology has advanced more in the last thirty years than in the previous two thousand. The exponential increase in advancement will only continue.
The meaning of life consists in the fact that it makes no sense to say that life has no meaning.
Prediction is very difficult, especially about the future.
How wonderful that we have met with a paradox. Now we have some hope of making progress.
I myself find the division of the world into an objective and a subjective side much too arbitrary. The fact that religions through the ages have spoken in images, parables, and paradoxes means simply...
You can recognize a small truth because its opposite is a falsehood. The opposite of a great truth is another truth.
When it comes to atoms, language can be used only as in poetry. The poet, too, is not nearly so concerned with describing facts as with creating images.
An expert is a man who has made all the mistakes which can be made in a very narrow field.
The opposite of a fact is falsehood, but the opposite of one profound truth may very well be another profound truth.