What caused you to stop believing in the supernatural?
Believing in the supernatural is not rational but at one time, I couldn't see that. It seemed the most rational thing in the world to believe in the supernatural. I did so without question. Rational meaning to develop your thoughts based on reason and logic. I suppose I lack a rational mind but didn't know it. The only requirement to be rational, I thought, was to have a brain.
Or perhaps you never believed in them. Good for you. You were born with a more rational mind.
I suspect I kept asking why and how. Perhaps that simply causes one's mind to become more rational overtime.