People like to say that they learn from their mistakes. I think that they learn from trying. They learn success by being successful. It may only be success in a limited environment, or a limited success - they have to stay flexible.
Another thing that we hear is that there are many ways to do something right. Sure - at least, several ways. But! There is a multitude of ways to get things wrong.
Now, there is a caveat. Well, not really a warning, but ... discoveries are sometimes made by seriously misunderstanding what we think we know. Yeah! Off on a tangent -- there it is! Something NEW.