Miriam: When Diana told us that The Book of Life says we're all linked, Chris and I went back and compared Diana's DNA to other creatures' DNA. That's when Matthew made the connection.
Matthew: It unlocked a new perspective. There it is, in the creature chromosome, hiding in plain sight.
Diana: What is?
Matthew: You have demon DNA, and so do I.
Baldwin: You have demon blood?
Matthew: Many of us do to varying degrees depending upon whether a demon ancestor was 20 generations ago or more recently.
Miriam: It also happens to be the key to blood rage.