The relativity principle in connection with the basic Maxwellian equations demands that the mass should be a direct measure of the energy contained in a body; light transfers mass. With radium there should be a noticeable diminution of mass. The idea is amusing and enticing; but whether the Almighty is laughing at it and is leading me up the garden path -- that I cannot know.

How do I work? I grope.

It is important to foster individuality, for only the individual can produce the new ideas.

Curiosity is a delicate little plant that, aside from stimulation, stands mainly in need of freedom.

Whatever your problems in math are, I assure mine are greater.

The State is made for Mankind, not mankind for the state

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