He went away once more, and prayed, saying: O my father, if this cup cannot pass away from me, but that I drink of it, thy will be fulfilled. ... When the petty captain, and they that were with him watching Iesus, saw the earthquake and those things which happened, they feared greatly saying, Of a surety this was the son of God. ... All power is given unto me in heaven, and in earth. Go therefore and teach all nations, baptising them in the name of the father, and the son, and the holy ghost: Teaching them to observe all things, whatsoever I commanded you. And lo, I am with you alway even until the end of the world.
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.