And again ... Costa Rica's turn to upset the odds this time. Not quite so stylish but unexpected (3:1!) and so the whole thing continues to fascinate. (We're not talking about rugby at the moment).
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.