Ideology is existence in rebellion against God and man. It is the violation of the First and Tenth Commandments, if we want to use the language of Israelite order; it is the nosos, the disease of the spirit, if we want to use the language of Aeschylus and Plato. Philosophy is the love of being through love of divine Being as the source of its order. The Logos of being is the object proper of philosophical inquiry; and the search for truth concerning the order of being cannot be conducted without diagnosing the modes of existence in untruth. The truth of order has to be gained and regained in the perpetual struggle against the fall from it; and the movement toward truth starts from a man’s awareness of his existence in untruth.
Eric Voegelin, Israel and Revelation, pp. ix-xiv