One of the joys of systematic expository preaching is that you can get on to subjects you might never look at yet subjects very relevant to those who hear you. We started on 1 Corinthians 7 in the morning and I was very much aware of the impact of such a subject on different people. We also had an engaged couple there we'd not met before so that was interesting for them as well as for the rest of us I hope. In the evening we looked at the Crown of life mentioned in James 1 and Revelation 2. We had tea together before the evening meeting. Lots of people were away, several on various forms of mission but there were visitors and we especially enjoyed having our friend Liz Rajo and the children with us.
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.