In the early years my dad worked in Girlings brake factory and would take sandwiches with him to work. Always marmalade, always Robertson's (okay Silver Shred sometimes if they didn't have the Golden Shred)
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.