I'm currently enjoying the new Julie Fowlis album - Julie Fowlis Live at Perthshire Amber. What you get, as ever, is a first rate ceilidh band and one of the sweetest voices out there. Recorded live at a music festival in the Pitlochry Festival Theatre last October, this hour long CD comes in an attractively prioduced cardboard sleeve. The set covers the highlights of the three studio albums and would make a fine introduction to the band. It also serves fans who have seen the live act or would like a taster of it. The studio albums and live performances are not radically different but this is well recorded and different enough to other albums to be worth getting hold of. Some of Julie's patter and the band's banter have been removed so you still have to be there to get the full live experience but this gives you a fair idea. I got mine here. It's also available on itunes I believe.
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.