“Some subjects are so serious that one can only joke about them.”

The meaning of life consists in the fact that it makes no sense to say that life has no meaning.

The best weapon of a dictatorship is secrecy, but the best weapon of a democracy should be the weapon of openness.

It is a great pity that human beings cannot find all of their satisfaction in scientific contemplativeness.

There are two sorts of truth: trivialities, where opposites are clearly absurd, and profound truths, recognised by the fact that the opposite is also a profound truth.

If an idea does not appear bizarre, there is no hope for it.

How wonderful that we have met with a paradox. Now we have some hope of making progress.

Address to Albert Einstein: You are not thinking. You are merely being logical.

When it comes to atoms, language can be used only as in poetry.

There are some things so serious you have to laugh at them.

One must always do what one really cannot.

There is no hope for any speculation that does not look absurd at first glance.

The opposite of a fact is falsehood, but the opposite of one profound truth may very well be another profound truth.

If anybody says he can think about quantum physics without getting giddy, that only shows he has not understood the first thing about them.

If we couldn’t laugh at ourselves, that would be the end of everything.

An expert is a man who has made all the mistakes which can be made, in a narrow field.

Physics is the belief that a simple and consistent description of nature is possible.

There was always another side to a joke, the side of the victim.

Many a truth is told in jest.

Do not mock a pain you have not endured.

I always told everybody the perfect joke would be where the setup and punch line were identical.

But I can tell you markets are like women, always commanding, always mysterious, always volatile, always exciting and it is not a joke.

I find that when I tell lawyer jokes to a mixed audience, the lawyers don’t think they’re funny and the non-lawyers don’t think they’re jokes.

Many a true word is spoken in jest.

The joke was that President Bush only declared war when Starbucks was hit. You can mess with the U.N. all you want, but when you start interfering with the right to get caffeinated, someone has to pay.