|Chaucer's yong Squier ... |
Syngynge he was, or floytynge, al the day,
He was as fressh as is the monthe of May.
(I had this idea when I was in college - explains a lot)
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.