Now suppose someone came along and asked, “What was the one big push that caused this thing to go so fast?” You wouldn’t be able to answer; it’s a nonsensical question. Was it the first push? The second? The fifth? The hundredth? No! It was all of them added together in an overall accumulation of effort applied in a consistent direction. Some pushes may have been bigger than others, but any single heave—no matter how large—reflects a small fraction of the entire cumulative effect upon the flywheel.
