Learning by doing

Why is experience in life considered to be the best teacher?
I think experience is one of the best teachers because when you do something you are actually involved in the whole process. And this helps you understand your behaviour and reaction towards a given situation. Learning by doing and teaching by experience can produce higher learning results and have a more lasting effect. Too many people in sales get a little bit of success and get carried away thinking they know it all, and don’t need to practice, study, plan, or review because they think they are already great. Sometimes that’s just the ego, but I think it’s imperative to remain humble. Do you think that happens in any other profession, sport, or activity?

For the things we have to learn before we can do them, we learn by doing them.
— Aristotle