In one's youth every person and every event appear to be unique. With age one becomes much more aware that similar events recur. Later on, one is less often delighted or surprised, but also less disappointed than in earlier years.

The step between genius and insanity is very short.

To punish me for my contempt for authority, fate made me an authority myself.

The pursuit of knowledge is more valuable than its possession.

To be free means to be independent, not to be influenced by what others think and say.

Imagination encircles the world.

To the extent math refers to reality, we are not certain to the extent we are certain, math does not refer to reality.