I'd meant to say we were at the cinema last week, watching The Children Act with Emma Thompson and Stanley Tucci. People have not been too kind to it but I thought it was very good. It deals with big themes - death, marriage, childlessness, career. friendship, religion, etc - and does it,a s far as I could see, without coming down too heavily handedly in a didactic manner. Rather, it presents the dilemmas strikingly and realistically and I found it very stimulating. I don't like to read up about a film before going so I had not realised it is based on an Ian McEwan novel. May be I wouldn't like the novel. I liked the film. Great acting from Thompson, Tucci and the young man.
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.