Habits are the behavioral expression of saṃskāra — grooves of conditioned response that operate below deliberate awareness, freeing the conscious mind for other tasks while automating the familiar. The cue-routine-reward loop described by Charles Duhigg maps precisely onto the Sutric analysis of how patterns form and perpetuate themselves. Lasting behavior change requires working at the level of the saṃskāra itself — not willpower applied against the habit but the redesign of the conditions that trigger and reinforce it.
Each step builds on the last.