Every gambler in history has understood, intuitively, what economists call the 'sunk cost fallacy' — and played through it anyway. That gap between knowing and stopping is precisely where William James located the deepest danger of habit: not in what we do, but in what we can no longer *imagine not doing*. James argued that habit's real power isn't compulsion — it's the slow shrinkage of the universe of alternatives. The person who has spent three years justifying small betrayals of their own standards hasn't lost their willpower. They've lost the cognitive vocabulary to picture behaving differently. The practical implication is uncomfortable: the habits most likely to cost you everything aren't the dramatic ones you're fighting. They're the ones so thoroughly rehearsed that the fight never even starts — because the alternative has become literally unthinkable.

Think of a behavior you've been doing for over a year — when did you last genuinely consider stopping it, and what does it mean that you didn't?

Drawing from American Pragmatism / Psychology of habit — William James (The Principles of Psychology, Chapter IV: 'Habit')