More importantly, Sacks recounts his full recovery, and the triumph of will it attests. In the chapter aptly titled after Diogenes the Cynic, "Solvitur Ambulando" - it is solved by walking - he clearly expresses the vital feeling of will that impelled his recovery, and that must be the impulsion behind all forward movement. For Sacks, that active feeling is literally the music of life.
It was the triumphal return of the quintessential living "I," lost for two weeks in the abyss, and two minutes in the delirium; not the ghostly, cogitating, solipsistic "I" of Descartes, which never feels, never acts, is not, and does nothing; not this, this impotence, this mentalistic fiction. What came, what announced itself, so palpably, so gloriously, was a full- bodied vital feeling and action, originating from an aboriginal, commanding, willing "I."There's much to be said for various forms and aspects of selflessness, but if you're ever chased down a mountain by a raging bull, you're going to want that aboriginal "I" to stand and lean on.