It was harvest Childs Hill style last Lord's Day. No produce on display but I preached from Psalm 65 and we sang some harvest hymns. In the evening it was another look at Numbers - Numbers 18 and the principles of service and support. We had no pianist for the first two hymns in the morning but we can manage Come ye thankful people and We plough the fields. We had a number of visitors present which is always encouraging.
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.