Accuracy and clarity of statement are mutually exclusive.

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

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

Of course I don't believe in it [pointing to horseshoe on his office wall]. But I understand that it brings you luck whether you believe in it or not.

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 exclusive features of the description, symbolizing the idealization of observation and description, respectively.

One must always do what one really cannot.

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