By request from crockergirl, this letter is from Isaac. (the following explanation contains a slight spoiler from '.07')
Please disregard the fact that his present state would make the writing of this letter quite impossible.
FROM: ISAAC
Let's face it; we weren't exactly best friends… In fact, I think its safe to say we saw each other as the enemy in the end.
At least, I know that's how I saw you. The danger I was meant to stop.
Can you blame me, though? You stole the woman I loved… that was not a good foundation for a relationship.
Even so, you did save my life once, and I guess if that doesn't earn some form of recognition on my part, then nothing does.
You always seemed so ready and willing to jump into something (saving the cheerleader and the world) you thought was important, regardless of whether or not there was possible danger to your own life.
You forced me to embrace my 'gift' like I hadn't before, and, if it weren't for that, I may never have. You told me I was 'supposed to know' where the cheerleader was, you believed, without any doubt, in the accuracy of my drug-induced prophecies.
The thing is, you kind of believed in them more than I ever did. When I realized what I was doing, it freaked me out. You kind of just accepted it, didn't you?
I admit I wanted to be the one to kill you. I wanted to be the hero… the one who saved the world.
But, I know the truth now.
That wouldn't have made me the hero that you already were.