So, yesterday on the Radio 4 programme Brain of Britain the contestants tackled my questions. They got one wrong and one right and according to the rules that means I win. So I'm looking forward to a book token courtesy of the BBC shortly. You can hear it here. My bit is about 12 minutes in.
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.