Your mind is a supercomputer that builds and creates when you direct it, but becomes dangerous when left idle. Unchecked, it generates mental noise: overthinking, anxiety, doubt. The trick is knowing when to engage it for real work and when to quiet it down.
Your mind is an incredible tool. It's an amazing servant, terrible master. Your mind can do incredible things. It can build, it can create, it can accomplish. It can help you out in so many ways in your life. It's a supercomputer. But when you're not using it, if you just let it run idle in the background, it'll drive you into the ground. You'll get stuck on the hamster wheel up here, and that's when you start overthinking, and the anxiety, and the doubt, and all that stuff comes in. So understand how to use your mind when you want to, and then ignore the mental noise when you don't.