So we - my wife, my son and I - headed off to our local school to vote. It must be exciting voting for the first time but we live in Barnet and so, unsurprisingly in some ways, my 18 year old could not do so. He had registered online within the stipulated deadline but Barnet, without letting him know he needed to send it, had not had his proofs of identification. So no actually he didn't vote. As he himself observes "so when they talk about the lack of Young voters maybe they should think about the system being broken rather than trying to figure out what's wrong with British youth?" Like his dad he enjoys a good rant, but how much better to have been voting, like his friends in Camden.
Bonhoeffer uses a similar phrase 'worldly Christianity'. It's J Gresham Machen that I want to line up most closely with. See his Christianity and culture here. Having done commentaries on Proverbs (Heavenly Wisdom) and Song of Songs (Heavenly Love), a matching title for Ecclesiastes would be Heavenly Worldliness. For my stance on worldliness, see 3 posts here.