Here's what I think

For the most part, there are two types of people in this world. There
are those who refuse to acknowledge the darkness and others who become
swallowed by it.

The first group will spend their whole lives running away from their
pain, but it always finds them because they never give themselves the
chance to learn from past mistakes.

The second instead focuses only on their loss and sadness. It's
impossible to enjoy the present or look forward to the future when you
spend every waking hour cursing your past.

I don't get along very well with either of these groups. The former
drops me when I need them the most and the latter is too wrapped up in
themselves to be of use to anyone else.

What makes us different is, while we both started out in one of these
groups, we've evolved beyond them. We both see the darkness in each
other and our selves and, while we do acknowledge them, we don't allow
it to consume us. We can see the beauty in the pain, because we
realize it's integral to learning who we are and become better people
as a result.

I think this is also the reason we compliment each other so well.
Whenever either of us starts to slip, the other is able to listen AND
understand.