At the recent Banner Kevin DeYoung mentioned to some of us that his next book was to be on homosexuality. Crossway were eager for a book on a very hot topic from a reliable and gifted writer. The book is well written and very helpful. On the face of it, it should not be a difficult task to show that the Bible opposes homosexual practice. What Kevin DeYoug does here is not only to deal with the relevant Scriptures in a way that is both orthodox and theologically robust but also to answer a series of seven common objections to the orthodox position - “The Bible Hardly Ever Mentions Homosexuality”;.“Not That Kind of Homosexuality”; “What about Gluttony and Divorce?”; “The Church Is Supposed to Be a Place for Broken People”; “You’re on the Wrong Side of History”; “It’s Not Fair”; “The God I Worship Is a God of Love”. This really is a very thorough book and very helpful. It also includes three appendices - same-sex marriage, same-sex attraction and what he calls a 10 commandments on the subject.
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.