We were only six on Wednesday but we had a decnet time of prayer preceded by a message from Gensis 18 on Abraham interceding for Sodom. Generally it is unwise to talk about prayer before people are about to pray but one man was quite exercised in prayer and to some extent prayed, I thought, in the sort of way Abraham might have.
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.