The following statements by Feser:
Idolatry is in fact the defining sin of modernity, and it is all the worse for being directed at man. The ancient pagan at least knew enough to worship something higher than himself
allow me to publish one of my favorite quotes from Chesterton:
Let Jones worship the sun or moon, anything rather than the Inner Light; let Jones worship cats or crocodiles, if he can find any in his street, but not the god within. Christianity came into the world firstly in order to assert with violence that a man had not only to look inwards, but to look outwards, to behold with astonishment and enthusiasm a divine company and a divine captain. The only fun of being a Christian was that a man was not left alone with the Inner Light, but definitely recognized an outer light, fair as the sun, clear as the moon, terrible as an army with banners. - GKC, Orthodoxy, Ch. V.Kant is absolutely critical to understanding oneself in the modern world. We are all Kantians by default; it is in the air we breathe. Only by a conscious effort at self-education is it possible to see our Kantian assumptions for what they are and, possibly, overcome them.