Gratitude: An imaginary emotion that rewards an imaginary behavior, altruism. Both imaginaries — Robert A. Heinlein
The giving up of personality traits, well-established patterns of behavior, ideologies, and — M. Scott Peck
We decided that humility was defined not by self-deprecating behavior or attitudes — Clayton Christensen
Pinball games were constrained by physical limitations, ultimately by the physical laws — Sherry Turkle