In our description of nature the purpose is not to disclose the real essence of the phenomena but only to track down, so far as it is possible, relations between the manifold aspects of our experience.

A person who wasn't outraged on first hearing about quantum theory didn't understand what had been said.

Oh what idiots we have all been, this is just as it must be

The opposite of every great idea is another great idea.

Sometimes the child in one behaves a certain way and the rest of oneself follows behind, slowly shaking its head.

It is, indeed, perhaps the greatest prospect of humanistic studies to contribute through an increasing knowledge of the history of cultural development to that gradual removal of prejudices which is the common aim of all science.

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