For Schopenhauer, the Will is an aimless desire to perpetuate itself, the basis of life. Desire engendered by the Will is the source of all the sorrow in the world; each satisfied desire leaves us either with boredom, or with some new desire to take its place. A world in thrall to Will is necessarily a world of suffering. Since the Will is the source of life, and our very bodies are stamped with its image and designed to serve its purpose, the human intellect is, in Schopenhauer's simile, like a lame man who can see, but who rides on the shoulders of a blind giant.