I posted this video here back in January 2010. I post it again to mark the death of Fontella Bass on Boxing Day. The priceless recording is from 1965 and remains an exciting performance of a great song.
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.