"Ignorance of the phenomenon of esoteric writing may even cause us to misunderstand the whole character of human thought as such, especially in its relation to politics or society. For, through the practice of esotericism, the great minds of the past endeavored to create the impression that they were supporters of the conventional political and religious views of their age. They used all their genius, in effect, to convince their (non-esoteric) readers that even their highest philosophical reflections always remained captive of the prevailing order. Thus, if one surveys the record of past philosophical writing without awareness of its esoteric character, one will necessarily and systematically misconstrue the relation of human thought to politics—or of reason to history, theory to practice—seeing every mind as merely the prisoner of its times. The result will be what in fact we see everywhere in the recent explosion of hermeneutical theory: the radical politicization or historicization of thought."
January 1, 1970
https://en.wikiquote.org/wiki/Historicism