While down at The Globe recently I noticed for the first time this house nearby. A plaque reveals that this was the house where Christopher Wren resided when involved in the building of St Paul's Cathedral on the opposite bank of The Thames (most conveniently reached these days by means of the Millennium Bridge). Apparently it was in this same house that Catherine of Aragon first lodged when she arrived in England in order to marry the son of Henry VII, Arthur.
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.