This article compares some aspects of the philosophical systems of Bloch and Spengler, considering their lectures of Goethe's Faust. Specifically, I considered only their masterpieces The Principle of Hope and The Decline of the West under three aspects: the research methodology of authors, their approach to Faust, and their conception of the Time. In particular, their different ideas of the Philosophy of History emerge. To finish, it is interesting to notice that a question of Aesthetics, such as the reading of Faust by the authors, is actually a problem of Philosophy of History.