Nine of us gathered yesterday to consider the second in a series on unseen realities. We looked at chunks of 1 Corinthians 15 and the resurrection of the body on the last day. I should have anticipated that there would be lots of questions. I was also rather poor gathering together material for prayer, several items only coming to mind after we had prayed. Many people to pray for at the moment. We got on with praying though and inched forward a bit I hope, by the grace of God.
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.