Robert J. Wilson quotes:

Hedonic Engineering -- The human nervous system studying and improving itself: intelligence studying and improving intelligence. Why be depressed, dumb, and agitated when you can be happy, smart, and tranquil?

The more internal freedom you achieve, the more you want: it is more fun to be happy than sad, more enjoyable to choose your own emotions than to have them inflicted on you by mechanical glandular processes, more pleasurable to solve your problems than to be stuck with them forever.