Education is what remains after one has forgotten what one has learned in school.

If tomorrow were never to come, it would not be worth living today.

Most people go on living their everyday life: half-frightened, half indifferent, they behold the ghostly tragic-comedy that is being performed on the international stage before the eyes and ears of the world.

Politics is more difficult than physics.

As long as there will be a man, there will be wars.

Classical thermodynamics ... is the only physical theory of universal content which I am convinced ... will never be overthrown.

From the viewpoint of a Jesuit priest I am, of course, and have always been an atheist.