Great day yesterday. My son, Rhodri, was preaching morning and evening. I have only heard him once or twice before so it was encouraging to hear him preach so well. He took us to Jonah 3 in the morning and in the evening to Mark 3 and 4. It was particularly nice to hear firstly, secondly and thirdly, which I still think are very helpful words in a sermon. He starts in LTS this coming academic year and I'm sure that will be a blessing to him. I can see why some would be happy to have him as pastor now but that thorough theological preparation will be for the best in the long run.
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.