This whole series is built upon the idea that mental health comes from health in your heart, soul, mind and strength. Not just one part will do. You need it from all four areas. That being said, one of the key components that produces mental health is trust. That's mainly a mind thing, and it won't make all your mental health struggles go away, but without it, it can give a whole lot of power to those struggles. We have clear examples in the Bible of people who struggled to trust God and found their mental health spiraling. Then when we see Jesus trusting God, even in the hard situations, those struggles don't get to control Him.
1 Peter 5:7
The more you trust God, the less power mental illness will have over you.
