Humor is by far the most significant activity of the human brain.
If little else, the brain is an educational toy.
The neurochemistry of the brain is astonishingly busy, the circuitry of a machine more wonderful than any devised by humans. But there is no evidence that its functioning is due to anything more than the 1014 neural connections that build an elegant architecture of consciousness.
—Carl Sagan in Cosmos
The chief function of the body is to carry the brain around.
Brain: an apparatus with which we think we think.
What a splendid head, yet no brain.
Exercising self-restraint can be depleting, yet it can also be ennobling.