Often slow on the uptake I recently noticed iTunes U and in particular a series of lectures by Douglas Kelly given at Reformed Theological Seminary on Mediaeval Theology. There are some 22 lectures (about 20 hours altogether I guess) looking at Boethius, Aquinas, etc, etc. They appear to have been given recently to undergraduates and are well worth checking out (I am on Lecture 19 by now). Kelly combines academic depth (in theology, philosophy and ancient languages) with warm presentation that is sometimes lightly humorous and often applied to today's issues. The stance is thoroughly evangelical but very even handed and seeks to point up the wisdom of our Medieval forefathers. For more info check 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.