I mean, making simulations of what you're going to build is tremendously useful if you can get feedback from them that will tell you where you've gone wrong and what you can do about it.
“I dream that someday the step between my mind and my finger will no longer be needed. And that simply by blinking my eyes, I shall make pictures. Then, I think, I shall really have become a photographer.”
“I'm always looking, as an actor, for activities. I think it's far more interesting to watch what people do than what they say. You always want to watch behavior, because the dialogue as written by our illustrious leaders is great. Eminently playable.”