We had only a prayer meeting (as they say) last night as we had already met the night before with Philip Amos, newly begun with CWI, who spoke to us about reaching our Jewish neighbours. Both meetings were a blessing. As has often been observed giving the meeting over almost entirely to prayer gave it a freshness that we sometimes lack. The talk about reaching Jews followed on from last week's meeting about reaching Muslims. Barnet is both about 15% Jewish and 15% Muslim. It is one of the factors that makes our work here so challenging.
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.