The interview with Janet Mefferd on Candle in the wind, my book on conscience was finally broadcast yesterday. You can hear it here. It is in two sections in the first half hour of the programme. It was a good opportunity to let people know about the book and hopefully increase sales.
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.