Some 11 of us gathered in the parlour last Wednesday, glad to be though our troubles with gas leaks. We carried on looking at 2 Timothy 1, chiefly in verses 10 and 11, considering God's grace, as it began before creation, with the appearing of Christ and then as declared by the apostle Paul, a herald and a teacher from God. We had a good prayer time too. May be we needed slightly longer. Lots to pray about.
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.