Acceleration is not the same as momentum. In classical mechanics, you can have massive momentum with zero acceleration — a cannonball mid-flight, not speeding up, not slowing down, simply carrying forward what was already set in motion. The ruinous habit often works exactly like this: not speeding up toward catastrophe, but traveling at high speed in a direction that was set years ago, when the conditions that made it sensible no longer exist. Alfred North Whitehead, whose process philosophy insisted that reality is not made of static 'things' but of ongoing events that must continually re-justify their existence, called this the 'fallacy of misplaced concreteness' — treating something dynamic as though it were fixed. A habit that once worked becomes a thing, a feature of your personality, something you are rather than something you are doing. The danger is not that it turns bad. The danger is that the world re-arranges itself around a different set of requirements, and the habit just keeps going — fully intact, fully functional, aiming at a target that vanished. What to do with this today: locate a habit you maintain primarily because stopping it would require deciding. Not because it's working. Because inertia is a perfectly valid reason until, one day, it isn't.

Pick a habit you've had for more than three years: what was true about your circumstances when you formed it that is no longer true now?

Drawing from Process philosophy / Whiteheadian metaphysics — Alfred North Whitehead (Process and Reality, 1929)