I decided to preach yesterday from 2 Peter 1:16-18 and 19-21, so on Scripture and its integrity, New Testament then Old Testament. They are not easy verses to tackle but I did my best and hope I got through to most of my hearers. In the evening I explained accommodation, inspiration and inerrancy, using Ferguson, Carson and the Chicago Statement from a few years back. Numbers were down a little, being that time of the year, but it was okay. Four Romanians with no English turned up in the evening. Very hard to be any blessing to them. I must pray for them though and the others who were there.
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.