And anyone who thinks they can talk about quantum theory without feeling dizzy hasn't yet understood the first thing about it.

Einstein, stop telling God what to do!

Truth and clarity are complementary.

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

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

One thought spectra are marvellous, but it is not possible to make progress there. Just as if you have the wing of a butterfly then certainly it is very regular with the colors and so on, but nobody thought one could get the basis of biology from the coloring of the wing of a butterfly.

Prediction is difficult, especially the future.