I have rather neglected this strand this month. Yesterday morning I reached John 3:16 as we continue to look at John 3. In the evenings we have been in Numbers and yesterday we took the three incidents in Numbers 20:14-21:3 (Negotiations with Edom, Aaron's death, victory at Hormah). We also had communion yesterday evening. Again we had decent congregations. Some people we were expecting were absent and some visitors were in, including a slightly eccentric lady from across the road, who brings her own challenges.
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.