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

Never express yourself more clearly than you are able to think.

It is very difficult to make an accurate prediction, especially about the future.

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.

Our task is not to penetrate the essence of things, the meaning of which we do not know anyway, but rather to develop concepts which allow us to talk in a productive way about phenomena in nature

The old saying of the two kinds of truth. To the one kind belongs statements so simple and clear that the opposite assertion obviously could not be defended. The other kind, the so-called 'deep truths', are statements in which the opposite also contains deep truth.

If anybody says he can think about quantum physics without getting giddy, that only shows he has not understood the first thing about them.