How, by gaining leadership of your mind, you can reduce anxiety

It is our minds that create our thoughts - negative ones and positive ones.
Most of our thoughts though are ones we passively receive and have no control over, just as if someone else was saying those things. And we believe them!
How would it feel though if you could take control of those thoughts and not only choose which ones you engage with, but start to take control of the voice that is sharing these messages with you??
It is possible.