The whole need not the physician, but they that are sick. Go and learn, what that meaneth: I have pleasure in mercy, and not in offering. For I am not come to call the righteous, but the sinners to repentance.
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.