This poster with the words Chariots of fire caught my attention. When you look at it you find it is nothing to do with Eric Liddell (or Elijah) but is announcing a sponsored cycle run for a charity called ssafa. And the irony? The run is on the Lord's Day, September 22.
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.