This is an extraordinarily good piece. I especially liked this:
The literary critic Frank Kermode, in “The Genesis of Secrecy” (1979), a pioneering attempt to read Mark seriously as poetic literature, made a similar point, though his is less historical than interpretative. Kermode considers Mark to be, as the French would say, a text that reads itself: the secret it contains is that its central figure is keeping a secret that we can never really get. It is an intentionally open-ended story, prematurely closed, a mystery without a single solution.