What is commitment and consistency principle?

Example: You have tried to write every morning for three separate stretches — and abandoned it each time within two weeks. On the fourth attempt, you tell your mastermind group: 'I will publish 500 words every weekday for 90 days. If I miss a day, I will post an explanation in the group chat.' Suddenly the calculus changes. On day 11, when you feel like skipping, the thought of typing 'I didn't write today because I was tired' to five people who respect you is more uncomfortable than opening the draft. You write. The commitment is the same one you made silently three times before. The only difference is that someone is watching.

This concept is part of Commitment Architecture in the How to Think curriculum.