This evening (Tuesday) we had Paul David Tripp giving the first of three evening addresses. He spoke on the latter half of Romans 8 and it was superb. This is my first exposure to Pastor Tripp and it was just wonderful. He spoke of grace, God for you. He spoke of uncomfortable, intervening, unstoppable, providing and undefeatable grace. It is settled he told Christians, now rest. God is not making spontaneous redemptional decisions. See here.
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.