Way behind with this but we did have another good session last week with a deent number present. Someone new to the area wandered in and felt at home (I hope) with us, even though we were looking at Leviticus 23 again (the last bit this time). Hope we see her again. Most people prayed in the prayer time.
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.