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 culturehere. 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.
We have a new member of the household. His name is Tuko and he is a bearded dragon, an early birthday present for my youngest son. He's no trouble, though getting his vivarium to the top of the house proved something of a major effort.