Michael J. Sullivan said this quote

That's the thing about hatred, it can become rancid, and it'll turn into poison if you keep it bottled too long. Hatred will eat through any container and seep into the groundwater of a soul. Revenge is never enough to expel it because it keeps bubbling up anew. What you don't realize–can't really–is that by that time, it's all you are. You don't have the hate in you. The hate is you. When that wine is consumed, you won't ever be able to rid yourself of it. Can't vomit it up or spit it out. It'd be as impossible as escaping yourself.