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.
I love these dream paintings. This one has it all - moonlight, snow, stars (one shooting), chimney smoke, glowing lights, a Christmas tree, a snowman, a steepled church,, etc, etc.