The current round of Sherlock on BBC 1 reveals that John Watson, assistant to Holmes, has the middle name of Hamish. (Conan Doyle only gives the middle initial H, and Hamish is Dorothy L Sayers' educated guess). It made me think of another Anglo-Scot, to whom so many of us are indebted, with the middle name Hamish.
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.