If you're intelligent, another thing you need to learn is that other people are not and how they think. For example, unintelligent people tend to hand off their understanding something to someone they perceive to be an intelligent authority. This works with politics, economics, religion, and many things. Generally, though, people who are not good at something are also not good at judging who is good at something. I was good at music once, but these days I'm sloppy. As a result of having become good at it, I know how to judge a musician's ability very well. Other people are merely impressed with the fact that I can play an instrument, and they can't even when my playing is currently a sloppy mess.