The pursuit of truth in science transcends national boundaries. It takes us beyond hatred and anger and fear. It is the best of us.

Every body continues in its state of rest or uniform motion in a straight line, except insofar as it doesn't.

Whatever else there may be in our nature, responsibility toward truth is one of its attributes.

The quest of the absolute leads into the four-dimensional world.

I don't believe any experiment until it is confirmed by theory. I find this is a witty inversion of "conventional" wisdom.

Schrödinger's wave-mechanics is not a physical theory, but a dodge - and a very good dodge too.

The universe will finally become a ball of radiation, becoming more and more rarified and passing into longer and longer wave-lengths. The longest waves of radiation are Hertzian waves of the kind used in broadcasting. About every 1500 million years this ball of radio waves will double in diameter; and it will go on expanding in geometrical progression for ever. Perhaps then I may describe the end of the physical world as-one stupendous broadcast.