It isn't just non-Christian Ephesians or non-Brits who worship idols. Christians do too. How much I need to continually submit, asking God to remove the idols from my own heart. In Jeremiah's words I far too easily ignore the cisterns full of living water that God provides and try to hew cracked and broken cisterns for myself that hold nothing of true, eternal value. At the end of the day that's what idols do, they replace the eternally valuable with the seemingly instantly valuable that isn't valuable at all. It only seems so because I did it.