We were a select few and mostly female last Wednesday (things change from week to week). We looked at Leviticus 20 a rather sordid chapter in some ways about adultery, incest, bestiality, etc. It is easy to get tripped up trying to exegete accurately. I'm still not sure about the penalty of burning for a certain sin but it may well be that this burning followed stoning, which many still have problems with but I don't think there's any easy way round that (even if we see this as a maximum penalty rather than a minimum one). We all prayed after having listed matters for prayer. We finished a little earlier than usual.
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.