“One must always do what one really cannot.”

Anyone who can contemplate quantum mechanics without getting dizzy hasn’t understood it.

Nothing exists until it is measured.

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.

She knew exactly where she needed to be.

Letting go is an art – master it and be free.

Pray like it all depends on God, but work like it all depends on you.

Where do we begin? Begin with the heart.

Broken glass taught me there is something so beautiful in shattering.

Don’t avoid the cliches – they are cliches because they work!

Do not be satisfied with little things, because God wants great things!

You are only ever as lost as the next step you choose to take.