ON ACTING: Sprezzatura
It is removing the scaffolding after completing the building. It is what defines a pro: great actors make it seem so easy that everyone thinks they can do it. It is Fred Astaire dancing. It is Mohamed Ali boxing: "floating like a butterfly, stinging like a bee."
A famous American actor James Cagney once said it well: Acting is "learn your lines, don't bump into the furniture, and never get caught acting." It is sprezzatura, the art that conceals art.