In the teaching of geography and history a sympathetic understanding (should) be fostered for the characteristics of the different peoples of the world, especially for those who we are in the habit of describing as "primitive.

If you took half of something and continued to take half of that half and so on, you would never reach an end.

If you can't explain it simply, you don't understand it well enough.

The height of stupidity is most clearly demonstrated by the individual who ridicules something he knows nothing about.

When you are courting a nice girl an hour seems like a second. When you sit on a red-hot cinder a second seems like an hour. That's relativity.

If I were not a physicist, I would probably be a musician. I often think in music. I live my daydreams in music. I see my life in terms of music.

Time and space are not conditions of existence, time and space is a model for thinking