Thought is a strenuous art - few practice it, and then only at rare times.

The great Jewish scientists and philosophers of the last few generations - Spinoza, Einstein, Freud, Robert Oppenheimer and others - were natives of Europe and America.

Anyone who doesn't believe in miracles is not a realist.

Without moral and intellectual independence, there is no anchor for national independence.

Courage is a special kind of knowledge: the knowledge of how to fear what ought to be feared and how not to fear what ought not to be feared.

If an expert says it can't be done, get another expert.