While I was at the Affinity conference in February where J V Fesko was a speaker I picked up his Christ and the Desert Tabernacle which I have now read. It is an excellent little resource that looks at the closing chapters of Exodus and over the course of 13 chapters gives some excellent messages drawn from the various pieces of furniture in the tabernacle and associated matters. He talks about baptism, communion, prayer, keeping the Lord's Day and various other matters in a way that is clear, uncluttered and theologically literate. As Philip Eveson notes there are no fanciful interpretations but rather a consistent biblically based exposition drawing on Genesis, Revelation, Hebrews and other relevant places with consummate skill. Loved it.
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.