Oliver Goldsmith 1730 – 1774) was an Anglo-Irish writer and poet, known for his poems, plays and his only novel The Vicar of Wakefield (1766), Often in debt an addicted to gambling, Goldsmith began writing as a journalist and hack in Grub Street.
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.