I am also increasingly struck by the mirroring between the Moment and the TARDIS. Both of them Time Lord boxes which grew to self-awareness and developed opinions, both temporally transcendent individuals who get "past" and "future" mixed up. And, of course, the Doctor keeps the TARDIS on the sidelines of any fight because she's the most powerful ship in the universe; the Moment is a good candidate for most powerful weapon in the universe, as the one thing in the Vault of Rassilon Forbidden Weapons that wasn't used—

Except that what makes her so dangerous isn't her sheer destructive capacity, but the fact that she'll get into your head. A little bit like the TARDIS, which takes you where you need to go whether than where you think you're headed. Or like the Doctor, who flips your world upside down whether you like it or not. I get the feeling that nobody comes away from an encounter with the Moment with their self-deception intact. (Maybe that's why it isn't a "of Rassilon;" maybe Rassilon didn't want to look himself in the eye.)