A bit behind here but there were 11 of us last Wednesday (nine men and two women). We continued in 2 Timothy 2 coming to the third in the trio - the hard working farmer (having looked at the good soldier and the athlete). We spent a lot of time looking 2 Timothy 2:7 about reflecting on all these things and knowing insight from God. There was a time of prayer too, of course. It was a good time.
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.