Then presuppose that as self evident truth and then rationalize the text towards that.
More than a little hard, but that isn't a surprise because he used modern authors who used modern( i.e. plain) language in books that were by a single author.
Basically he's cheating, or being intellectually dishonest if you will, by using an uneven analogy. If he chose some sort of anthology of poems, short stories, fables, and essays written in, say, the mid 19th century, the analogy would be good.
Of course you did say 'any text.' I would avoid using that term in the future.
My favorite thing to do in this regards if to pick up a comic book, and find predictive versus in Nostradomus or the Bible that can be interpreted as "predicting" the fictional elements of the story