I am become death, the destroyer of worlds.

The physicists have known sin; and this is a knowledge which they cannot lose.

To try to be happy is to try to build a machine with no other specification than that it shall run noiselessly.

We know that the wages of secrecy are corruption. We know that in secrecy error, undetected, will flourish and subvert.

If atomic bombs are to be added as new weapons to the arsenals of a warring world, or to the arsenals of nations preparing for war, then the time will come when mankind will curse the names of Los Alamos and Hiroshima. The people must unite or they will perish.

Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search.

Both the man of science and the man of art live always at the edge of mystery, surrounded by it. Both, as a measure of their creation, have always had to do with the harmonization of what is new with what is familiar, with the balance between novelty and synthesis, with the struggle to make partial order in total chaos.... This cannot be an easy life.