For the morning of the second day here at the Assembly we were led by Paul Watts from Coventry for two sessions on transculturalisation. First, we had an introduction to the biblical material, chiefly from Acts and then after coffee something about practical application. This was a good presentation of the position most of us would take. I was sorry there was no immediate time for discussion as it raises a host of questions. It is an old chestnut and the devil is in the detail.
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.