We are rather behind with this but we had a fairly well attended meeting last Wednesday in the chapel parlour. We looked at 2 Timothy 2:3, 4 The Good Soldier (a searching passage) and had a good time of prayer to follow. It was our privilege to have present both the pastor emeritus and the pastor elect of Alfred Place Baptist Church, Aberystwyth (ie my father-in-law and my son).
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.