Everything we call real is made of things that cannot be regarded as real.
It is the hallmark of any deep truth that its negation is also a deep truth.
A physicist is just an atom's way of looking at itself.
We are trapped by language to such a degree that every attempt to formulate insight is a play on words.
Those who are not shocked when they first come across quantum theory cannot possibly have understood it.
Every great and deep difficulty bears in itself its own solution. It forces us to change our thinking in order to find it.