Following the publication of Being and Time (1927), Heidegger's conception of Being underwent a process of progressive reification, seen vividly in his attempt to materialize it in the political sphere by merging it with the Nazi movement and then, as he distanced himself from the Nazis and increasingly withdrew into isolation, in his hypostatizing Being into something of the nature of a divine force or energy. This study is an investigation of the salient themes that pervaded Heidegger's personal psychological world and of how these themes left their imprint on both his philosophy and his version of Nazism. It will be shown that both Heidegger's life and work were dominated by the quest for individualized selfhood and the accompanying struggle against annihilating aloneness.