I apologize if I happened to accidentally butcher Hebrew grammar.
I happened to bump into Ecclesiastes 11:9 recently. You know how it starts? Yorokobe, shounen... (Well, "Semakh bahur"). Bahur ("young man") is also etymologically derived from "chosen one".
Yes, Kotomine was quoting (read: twisting) the Bible.
(Not that I give credit to Nasu for this though. I think it's just a happy coincidence, as the line ends up sounding completely different in most Japanese versions of the Bible as well as in the newer English translations. Notably, the specific gender in the original is almost always glossed over.)
