Philip Zimbardo

Habit allows us to go from 'before' to 'after,' to make life easier and better. Habit is notorious - and rightly so - for its ability to direct our actions, even against our will; but by mindfully shaping our habits, we can harness the power of mindlessness as a sweeping force for serenity, energy, and growth.

It is only when you watch the dense mass of thousands of ants, crowded together around the Hill, blackening the ground, that you begin to see the whole beast, and now you observe it thinking, planning, calculating. It is an intelligence, a kind of live computer, with crawling bits for its wits.