Short

Anger doesn't exist without nostalgia.

I'm angry, that I'm not there anymore. I'm angry at what you did. I'm angry at what I did. I'm nostalgic for the pain I experienced, and caused. I'm nostalgic for the good times that weren't good at all.

Sometimes we go back and forth between euphoric recall and nostalgic anger. They are the same. They don't differentiate. So why should we?