Grasp the Key to Solve the Whole

CORE DEFINITION

The idiom derives from the net, whose main cord is the gangliong and whose meshes open when that cord is drawn. Applied to problems, it holds that a complex situation contains a key constraint or core relation whose handling causes the rest to fall into place. The core proposition is that leverage lies in identifying that central element, so effort concentrated there produces system-wide effects while effort spread across details produces local improvements only. The key qualification is that the key must be identified correctly, because pulling the wrong cord leaves the meshes closed, and a wrongly chosen key wastes more effort than no key at all.