Late with this again I'm afraid. We had lunch in church which we do from time to time. That was good. Lots of older ones away and others too but quite a few younger people (17-21) one way or another which is good. I began on 2 Peter 3 in the morning and returned to Numbers in the evening to begin looking at Balaam. Quite a small congregation by the evening.
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.