It took about fifteen weeks—a little more than three months—for Dr. Ham to change my inner narrative from a hateful whip-bearing tyrant to a chill(er) surfer dude.

… the way to change personality is, essentially, by faking it until you make it. Virtually all researchers agree that the key to changing personality is to alter your daily thoughts and actions. The best personality-change interventions help people figure out what they want to change, tell them how to change, and remind them to continue changing.

It seems that the word “personality” is nuanced and suggests being unchangeable. But if we’re talking about a view of the world, well, then, that should be possible to alter.