When I was in high school, I earned A’s in all my math classes — until I took calculus. In algebra and geometry, I could coast on memorizing formulas, but now I had to think for myself.
It was disastrous, culminating in my getting a charity “C,” and I barely passed my college calculus class.
The reason, I was convinced, was that I didn’t have a math mind. I have avoided the subject ever since.