Will, Representation, Power

In his earlier works, e. g. WWR and Fourfold Root, Schopenhauer presents two kinds of self-awareness: inner, or "self-consciousness", the object of which is one's Will, and, outer, i. e. the Representation of one's external body.  However, in his later On the Freedom of the Will, in the second chapter, he introduces a third kind, the object of which is "the feeling, 'I can do what I will'".  As he proceeds to characterize it, "This consciousness forms a bridge between the inner and the outer worlds, which otherwise remain separated by a bottomless abyss.  Without this bridge, the outer world would contain mere perceptions independent of us in every sense, and the inner world nothing but ineffective and merely felt volitions."  He might have added that without that consciousness, the World as Will and Representation, which combines both worlds, would be impossible.  Thus, the fundamental principle of his system, its Archimedean point, is 'I can do', or, in other words, Power.  The potential significance to Nietzsche of recognizing that principle is obvious.