Jane Austen 1775 – 1817 writer of romantic fiction, set among the landed gentry. One of the most widely read writers in English literature, as popular today as she has ever been and a personal favourite. Apparently her realism and social commentary has gained her historical importance among scholars and critics.
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.