Having the most wonderful wife in the world is a real boon at times. Last Friday she took me off to a lovely hotel in the country just for 24 hours to celebrate my last birthday. We just had a couple of meals at the hotel where we stayed (The Red Lion, Whittlesford Bridge, Cambs, near Duxford) had a quick look at Audley End House and "did" Saffron Walden before heading back but what a great time.
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.