I have heard it said that the difference between being a professional musician and an amateur musician is this: An amateur musician practices until they get it right. A professional musician practices until they cannot get it wrong . That makes some kind of sense to me. They were talking about classical musicians, but I wondered about other kinds of musicians and for that matter other kinds of artists. I, myself am an amateur actor. The idea of practicing a scene until you could not get it wrong, just doesn’t work. You can practice memorizing your lines until you can’t get them wrong, but you don’t have to be a professional to do that. And memorizing lines is only about ten percent of what it takes to be an actor. To be a professional actor does take training. There are not many professional actors who simply lucked into a career. It takes work. It takes practice too, but not the kind of practice that a musician engages in. You don’t go over and over a particular part or scene ...