I think people are ready for things at certain times.

I think history class was wasted on me in high school because I was a kid and didn't have much life experience. But years later with a better grasp on human nature I think I would have had a better grasp.

Another example is a foreign language class. I took it in middle school, in high school and later in college. I learned lots and lots of theory for many years. But only when I went to another country did I learn I hadn't learned.

I think theory needs to be combined with: experience and practice.