Yesterday was Remembrance Day so we started, as we usually do, with two minutes silence and the hymn Our God our help. I preached on John 3:19-21 rounding of a series on that section. In the evening we had tea and a bookstall and then I preached on Numbers 21:10-35 about pressing on and battling on in the Christian life. Numbers were a little bit down in the evening I think.
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.