Something unfamiliar.

I thought I saw something unfamiliar to my nature, today. Seeing it surface but turning away before I could confirm if what I was seeing was actually what I thought it was. And then hitting me in full force, I hear myself say, this is what bitterness looks like. Oh, how ugly it is. Ugly, ugly, ugly. This is what causes hearts to decay. I cannot put this in a box, close the lid and slide it in the darkest corner I can find. I can't let the dust settle on this. But what do I do?