Boxes are BAD!

WARNING: Major Spoilers for Cassandra Clare's Clockwork Angel!

Has anyone (and by "anyone," I mean ME) noticed that bad things come in boxes in CA?

No, seriously. Allow me to demonstrate:

1) demon energies are stored in a wooden BOX called a Pyxis (according to Wikipedia, pyxis is latin for box)

2) Jem’s demon drugs are kept in a silver enameled BOX

3) Nate finds his mother’s diary pages in her jewelry BOX, which lead him to Mortmain

4) something bad happens to Will when he opens a BOX (possibly the same box that Jace inherits in CoG, if it’s a Herondale family heirloom)

5) Nate kills his aunt with a poisoned BOX of chocolates

No good comes from boxes in this book. People, beware the boxes!

Also, here are my questions about the Pyxis:

- What happens if the demon energies in the Pyxis are simply released into the atmosphere?

- With no use for them, like animating an evil clockwork army, what happens to them?

- Do the demon energies return to their own dimensions, like when a demon is killed in its physical form?

- Or does the demon consciousness immediately seek another vessel, such as a human being?

- Can the consciousness of a demon exist inside a living creature?

- When released from its prison, can the demon energy take on physical form without the aid of another vessel?

I think that the mystery box from Will’s childhood contained the consciousness of a demon, and in opening the box he inadvertently released it. Right into himself. If it’s possible that demons can inhabit the bodies of humans, then Will may have been the nearest vessel on hand. There may be a demon inside him, struggling against his soul (it’s mentioned more than once that demons don’t have souls), fighting for control of his body. This might have led him to hurt someone he loved (possibly this Cecily), forcing him to flee his family in order to protect them. He joins the Shadowhunters so he can spend the rest of his life killing demons, in the hopes that he will defeat his own personal demon. The demon within could explain Will’s cruelty to everyone but Jem (and Tessa) who also shares a troubling demon past and who is in the grips of a demon addiction.