Each turn of the flywheel builds upon work done earlier, compounding your investment of effort. … 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 just 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.