https://mathenchant.wordpress.com/2016/01/16/how-to-be-wrong/
The definition of an expert (attributed to physicist Niels Böhr) is, any person who's made all the mistakes that can be made in some narrow area of human endeavor, and has learned not to make those mistakes anymore. So making those mistakes is an unavoidable part of the learning process. Remember the movie Groundhog Day? The main character, Phil, eventually acquires various skills, such as playing the piano, throwing playing cards in a hat from far away, avoiding insurance salesman Ned, and wooing coworker Rita, but it's by messing up over and over again; he has to stick his foot in the same hole in the ground, or in his own mouth, a bunch of times before he learns not to stick it there.
