If you take one rivet out of an airplane, it will be all right, it'll keep flying. You take another rivet out of the airplane and it still flies. So what the heck, let's take more rivets out of the airplane, and sooner or later, the airplane drops from the sky.
“The architecture of our future is not only unfinished; the scaffolding has hardly gone up.”
“If I had had me for a student I would have thrown me out of class immediately.”