To try to become happy is to try to build a machine with no other specifications than it shall run noiselessly.

I am become death, the destroyer of worlds.

I need physics more than friends.

I must run the machine as I find it.

It is a profound and necessary truth that the deep things in science are not found because they are useful: they are found because it was possible to find them.

The peoples of this world must unite or they will perish.