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.
I was trying to remember someone's name - was it Justin or Julian. Turns out it was Jason. A lot of boy's names begin with J and end with N, it seems. Here are ten
1. John
2. Justin
3. Julian
4. Jason
5. Jordan
6. Jonathan
7. Jaden
8. Jefferson
9. Jackson
10. Jocelyn

Yesterday was St David's Day, of course, and so like all Welsh people (you didn't?) we had cawl cennyn/leek soup and bakestones for tea. Owain, my youngest, also met the speaker of the House of Commons John Bercow who was involved this year in the annual St David's Day service in St Mary Undercroft. As usual, the London Welsh School took part, as did a male voice choir Eschoir. This time the children recited Ffrindiau bach a mawr and sang Dewi Sant.