An impression which simply flows in at the pupil's eyes or ears and in no way modifies his active life, is an impression gone to waste. It is physiologically incomplete... Its motor consequences are what clinch it.
William JamesHabit is the enormous flywheel of society, its most precious conservative agent. There is no more miserable human being than one in whom nothing is habitual but indecision. Full half the time of such a man goes to the deciding, or regretting, of matters which ought to be so ingrained in him as practically not to exist for his consciousness at all.
William James