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This is cool because once you realise that you can break habits, you realise you can also form them too.

Habits are about frequency and ritual. Thus I can use the same process to start good habits that make me a better more effective person.

"We are what we repeatedly do. Excellence, therefore, is not an act but a habit."

It's as if over time, we leave parts of ourselves all around us, which in turn, come to shape who we are.

This is a powerful thought and could be used to make a very interesting video game.

or a movie or even a novel

Profound yet simple. Essentially this article is saying:

By changing your environment you can dramatically change your behavior to the point where it can literally kick a heroin habit.

I would turn this round. Your habitual behaviour comes to be associated with your environment. By removing yourself from that environment you find that those habits become weaker and may vanish. Behaviour isn't changed so much as behavioural cues can be eliminated.