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

It is not enough to be wrong, one must also be polite.

You must come to Copenhagen to work with us. We like people who can actually perform thought experiments!

No paradox, no progress.

There are trivial truths and the great truths. The opposite of a trivial truth is plainly false. The opposite of a great truth is also true.

Opposites are not contradictory but complementary.

The present state of atomic theory is characterized by the fact that we not only believe the existence of atoms to be proved beyond a doubt, but also we even believe that we have an intimate knowledge of the constituents of the individual atoms.

Oh what idiots we have all been, this is just as it must be.

Predition is risky, especially of the future.

Truth and clarity are complementary.

No, no, you’re not thinking; you’re just being logical.

It is the hallmark of any deep truth that its negation is also a deep truth.

In the great drama of existence we are audience and actors at the same time.

We are trapped by language to such a degree that every attempt to formulate insight is a play on words.

The great extension of our experience in recent years has brought light to the insufficiency of our simple mechanical conceptions and, as a consequence, has shaken the foundation on which the customary interpretation of observation was based.

A person who wasn’t outraged on first hearing about quantum theory didn’t understand what had been said.

The measurement we get when we measure something is not a property of the thing measured.

What greater gift than the love of a cat.

As long as you believe in yourself, there is no limit to the greatness you’ll do. The universe is magic I promise it’s true.

If we as a people realized the greatness from which we came we would be less likely to disrespect ourselves.

To like many people spontaneously and without effort is perhaps the greatest of all sources of personal happiness.

The more tranquil a man becomes, the greater is his success, his influence, his power for good. The calmness of mind is one of the beautiful jewels of wisdom.

Whether you be a man or woman you will never do anything in this world without courage. It is the greatest quality of the mind next to honor.

It’s a thing of no great difficulty to raise objections against another man’s oration, it is a very easy matter, but to produce a better in its place is a work extremely troublesome.

If I’m not the love of your life I’ll be your greatest loss instead.