The eternal mystery of the world is its comprehensibility … The fact that it is comprehensible is a miracle.

Some recent work by E. Fermi and L. Szilard, which has been communicated to me in manuscript, leads me to expect that the element uranium may be turned into a new and important source of energy in the immediate future. Certain aspects of the situation which has arisen seem to call for watchfulness and, if necessary, quick action on the part of the Administration.

I am convinced that He [God] does not play dice.

I never think of the future. It comes soon enough.

E = mc 2 .

God is subtle but he is not malicious.

Science without religion is lame, religion without science is blind.