Elizabeth Scalia, author of Strange Gods: Unmasking the Idols in Everyday Life, finds them – and not just in the places you’d expect:
Perhaps primarily what is strange about our idols — beyond the fact that they are strange gods we were never meant to place before the Creator — is that they are so interior to us. When you mention an idol, the first image most people will conjure up is the golden calf the Hebrews created while Moses was on the mountain. It was an external thing, something outside of the people themselves — and they understood the God of Abraham to be outside of themselves, too. We are more sophisticated in our understanding, now — so comfortable with the notion of “God within” that we barely think what it means.
We may still have idols residing outside of ourselves — if we allow our things, our possessions and creations to stand between us and God, and to essentially own us — but we are very adept at burnishing the godlings of the mind, the ideas and opinions and beliefs formed interiorly. These are petted and loved and fed, and they grow directly in proportion to how much we indulge them, until they become the object of our enthrallment and the entity we serve. If our ideology, for instance, has become an idol, then we nourish it by reading only what suits our point of view; we speak and gather with only those who think as we think; we visit websites that echo our thoughts back to us, until we lose sight of anything beyond it — even the humanity of the one who does not conform to our beliefs. We begin to serve the idol of the idea, alone.