Becoming the best version of yourself requires you to continuously edit your beliefs, and to upgrade and expand your identity. - James Clear

You can be relaxed and dedicated. Just because you worry more, doesn't mean you care more.

Your identity can hold you back:

-I'm terrible with directions.
-I have a sweet tooth.
-I'm bad at math.

…or build you up:

-I'm the type of person who doesn't miss workouts.
-I finish what I start.
-I read every day.

Build habits that reinforce your desired identity.

When nothing seems to help, I go and look at a stonecutter hammering away at his rock, perhaps a hundred times without as much as a crack showing in it. Yet at the hundred and first blow it will split in two, and I know it was not that last blow that did it — but all that had gone before.