In earlier, more rigid, less encouraging (and ultimately, more helpful) decades, things would be much clearer: you would stop when you turned forty, or when you got married, or when you had kids, or after five years, or ten years, or fifteen. And then you would go get a real job, and acting and your dreams for a career in it would recede into the evening, a melting into history as quiet as a briquette of ice sliding into a warm bath.
