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.

Accuracy and clarity of statement are mutually exclusive.

Einstein, stop telling God what to do!

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 wrong to think that the task of physics is to find out how nature is. Physics concerns what we say about nature.

In physics we deal with states of affairs much simpler than those of psychology and yet we again and again learn that our task is not to investigate the essence of things-we do not at all know what this would mean&mash;but to develop those concepts that allow us to speak with each other about the events of nature in a fruitful manner.

A deep truth is a truth so deep that not only is it true but it's exact opposite is also true.