In the Art of War, first comes scoping, then measurement, then calculation, then balancing and finally victory. The Earth is the basis for scoping, scoping the basis for measurement, measurement the basis for calculation, calculation the basis for balancing, and balancing the basis for victory. A victorious army is just as an yi is to a shu. And a defeated army is as a shu to an yi. A victorious army carries all the weight of flood water plunging into a thousand-foot gorge.
~ Sun Tzu, The Art of War