Dreams
When I examine myself and my methods of thought, I come to the conclusion that the gift of fantasy has meant more to me than my talent for absorbing positive knowledge.

Ignorance & Stupidity
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Imagination
Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.

Sanity & Insanity
Insanity: doing the same thing over and over again and expecting different results.

Value
Not everything that can be counted counts, and not everything that counts can be counted.