Can you tell yourself a story that’ll make you upset? For instance: “I just heard a noise and I’m pretty sure it’s zombies that came to destroy me.” If you can do that, does that mean you can also tell yourself a story that’ll make you feel good? For example: “I just heard a noise and I’m pretty sure it’s Santa Claus that came to deliver an early Christmas present — I can’t wait to open it!!!”
And what if you keep telling yourself pleasant stories from now on? THAT is how you have a great life. Perpetually telling yourself stories that make you feel good, while refraining from telling yourself stories that make you feel bad, is mental discipline. Neither story is necessarily true, they’re merely inspired by true events.
You have a choice in every situation: tell yourself a dour tale or a delightful one. And because YOU get to make that choice, it means YOU decide whether you have a great life or a nasty one. It’s that simple: if you’re going to keep telling stories to yourself, you might as well make them as pleasant as possible.