I still have this box full of old cassette tapes, mostly classical, that needs sorting. (Remember cassettes anyone?). Among them is a copy of Irish group Planxty's fourth album from 1979 After the break. I have no idea when I bought it (obviously after 1979 and no doubt before 1990, probably in 1980 or 1981) but I remember playing it with enjoyment. It has been good to enjoy them again. There are eight tracks (two tracks recorded at the time were added to the CD). They are somewhere between Chieftains and Horslips I guess. I remember one of my sons enjoying the first album a while back and I have Follow me up to Carlow on my ipod. They are probably due a retro exploration some time soon.
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.