I took these three cassettes to the Charity Shop recently. The first is a souped up version of Frank Ifield's She taught me to yodel, an old favourite; then there's After the break by Planxty which I now have on itunes; the third is a bouzouki album I bought in Cyprus years ago. I think this is it here. Cassette technology - really missed said no-one.
The similar phrase 'Worldly Christianity' is one used by Bonhoeffer. 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.