We look at "Rousseau" (= Wordsworth) in The Triumph of Life describing the disappearance of the shape all light, fading like Venus into the light of common day.  Then on to Mont Blanc as a poem about the struggle between the mind and the world as to which is to be master, and the jiu jitsu by which the mind wins by letting the world (= Mont Blanc) utterly overwhelm it.  Relation to the sublime.