We started on our Christmas themes this week with Luke 2:7 (the manger) and Matthew 1 (the women in the family tree). We didn't manage to tempt any newcomers in but it was good to have the students back, swelling the cpongregation. We had communion before the evening service. 2 Corinthians 8:9 was a great text for the occasion.
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.