Way behind here but last Wednesday was interesting in that we had three Iranians present, two with limited English. We looked at Psalm 126, carrying on in our series. I think I got it over. I made three points from the psalm 1. Remember that restoration to the Lord's favour is a great blessing and brings immense joy 2. Recognise that the great things the Lord did then should stir us to seek great things again 3. Realise that those who weep now as they sow will sing with joy when the harvest comes. We had our usual session of prayer too and most people prayed.
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.