It is impossible to get out of a problem by using the same kind of thinking that it took to get into it.

... on principle, it is quite wrong to try founding a theory on observable magnitudes alone. In reality the very opposite happens. It is the theory which decides what we can observe.

Most teachers waste their time by asking question which are intended to discover what a pupil does not know whereas the true art of questioning has for its purpose to discover what pupils knows or is capable of knowing.

The pursuit of knowledge for its own sake, an almost fanatical love of justice and the desire for personal independence -- these are the features of the Jewish tradition which make me thank my stars that I belong to it.

We can understand almost anything, but we can't understand how we understand.

My only refuge, as a serious young man, from the despair of my financial burden to my family, is that I did everything I could to never permit myself any amusements or diversions except those afforded by my studies.

There is no scientific antidote, only education. You've got to change the way people think. I am not interested in disarmament talks between nations . . . What I want to do is to disarm the mind. After that, everything else will automatically follow. The ultimate weapon for such mental disarmament is international education.