It so turns out that innovative guitarist Jimi Hendrix lived briefly with his girl friend in a flat next to Handel's old house and so besides this blue plaque there is also a small section of the Handel House Museum given over to him. There is nothing like that anywhere. hendrix and Handel, there's a thought.
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.