We had a great start to our conference yesterday evening. Ian Parry preached from Exodus 15. I was surprised to know he had been 55 minutes. It didn't really seem that long. You can access the wholeservice here on Youtube.
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.