The similar phrase 'Worldly Christianity' is one used by Bonhoeffer. 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.
This is my first formal day off in a few weeks after the holiday. It was spent reading and TV watching in the main. I recently bought missing volumes from the series on Particular Baptists and enjoyed reading some of those plus a chunk of Bill Bryson's Mother tongue. I also popped out for a coffee nd did a bit kof blogging.
