In the fourth watch of the night Iesus came unto them, walking on the sea: and when his disciples saw him walking on the sea, they were amazed, saying: it is some spirit, and cried out for fear. And straightway Iesus spake unto them saying: be of good cheer, it is I, be not afraid. ... He answered and said: it is not good, to take the children's bread, and to cast it to whelps. She answered and said: it is truth, nevertheless the whelps eat of the crumbs, which fall from their masters' table. ... And Iesus answered and said to him: happy art thou Simon the son of Ionas, for flesh and blood have not opened unto thee that, but my father which is in heaven. And I say also unto thee, that thou art Peter. And upon this rock I will build my congregation: and the gates of hell shall not prevail against it.
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.