I seldom have strange dreams or I seldom remember them anyway. Last night, among other things, I dreamt I was in a church that had the sword that was used to behead the apostle Paul. No idea where that came from or even if such an item is claimed to exist.
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.