Man craves meaning, and pursues it one of two ways. He either looks to himself and his own logic and experience, or he turns to God. If we really want to live meaningfully, we must daily submit our minds to His redemption, trusting His insight above our own.
The church itself is hardly secure from idolatry. I propose that the tallest and ugliest idols rule some of our churches. Some worship exclusively at the most saintly altars, in the name of Christ, thinking with a sense of self-satisfaction that they are worshipping Christ himself. The devil laughs.