Head to head
The core distinctions
The book turns on a few sharp contrasts. Here they are, side by side.
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Identity vs Discipline
Discipline forces behaviour against your self-image. Identity makes the behaviour the natural output of it.
Identity-based goals vs Outcome-based goals
One aims at a result. The other aims at a person. They behave very differently when life gets in the way.
Identity change vs Motivation
Motivation is a mood you wait for. Identity is a structure you build. One of them shows up on the hard days.
Identity vs Habits
Habits are what you do. Identity is who does them. Change the second and the first reorganises around it.