I forgot to add my comment on the last midweek meeting, as promised. We had a church members' meeting the next night and I was involved in the children's work Friday evening. Also on Thursday I was speaking at a fraternal up the road. So Wednesday night we had a good number there and a good prayer time as we carried on with the subject of spiritual growth talking about personal prayer, journal keeping and devotional reading. We also started on family duties, namely family worship and hospitality. All practical stuff. We began with Cowper's wonderful Jesus, where'er Thy people meet.
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.