I have the power to change.

A sofa moved to the other wall changes where people sit, which changes whether the television is the centre of every evening. One afternoon of effort, months of different behaviour.

Power over yourself is rarely exercised head-on. Willpower is expensive and tends to run out by four o'clock. Arrangement is cheap and works while you're asleep.

So the question isn't whether you can force a change. It's which small structural thing you could shift this week that would make the change close to automatic.