I think a lot of people learn at a shallow level. That's what I used to do. I'd "read" textbooks with the illusion of gaining knowledge. But real knowledge I've

I think a lot of people learn at a shallow level. That's what I used to do. I'd "read" textbooks with the illusion of gaining knowledge. But real knowledge I've learned is earned through a level of torture in trying to answer practice problems that's almost self-torture.