Lyric discussion by skateboarder873 

Cover art for Quito lyrics by Mountain Goats, The

I think this song is about him becoming sober, and no longer on Meth. I think it's pretty obvious when you keep that in mind and read the lyrics.

Xcats summarizes it pretty well.

He's also going to apologize and such for those who went through that with him, emotionally, and physically. And apologize to those he hurt.

I think too, that he wants to be able to bring those that have been lost (through addiction) back to life, because he's finally sober and "free"