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

If you think you understand it, that only shows that you don't know the first thing about it.

Opposites are not contradictory but complementary.

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

Those who are not shocked when they first come across quantum theory cannot possibly have understood it.

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

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