Adventures in "the Bible as literature"

There's maybe one more thing I have to say about poetry and grief, but I am going to take a break from that to throw out two little symmetries in the Bible that I've been thinking about:

• The Incarnation as an ironic fulfillment of the serpent's false promise: not that we shall become like God, but that God will become man! This is laid out right there in the text, of course, in the "he shall bruise your head / and you shall bruise his heel" bit.  But thinking about it in light of the serpent's own words makes him (the serpent) a bit a Greek tragic hero, in the sense that his hubristic words outline his own downfall.
• Calvary as an inversion of the Flood.  Flood: everyone is sinning, kill them all except this one righteous man.  Calvary: everyone is sinning, kill the one righteous man.

So tell me, Ben, are these parallels Seminary 101? I won't lie, I was a little proud of intuiting them, but surely others have pointed them out before.  I think these things are neat, but can we draw any theological notions from them? Let's converse!