I'm not sure how to get good photos of shadows (don't explain) so you'll have to trust me on this one but I looked up from my bed last night and what should I see but the silhouette of Alfred Hitchcock. My wife was not impressed but I called my son in and, fair play to him, he agreed with me. Life is always interesting.
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.