Bitterness: anger that forgot where it came from.

It is hope--with regard to our careers, our love lives, our children, our politicians, and our planet--that is primarily to blame for angering and embittering us. The incompatibility between the grandeur of our aspirations and the mean reality of our condition generates the violent disappointments which rack our days and etch themselves in lines of acrimony across our faces.

I want to say somewhere: I've tried to be forgiving. And yet. There were times in my life, whole years, when anger got the better of me. Ugliness turned me inside out. There was a certain satisfaction in bitterness. I courted it. It was standing outside, and I invited it in.

The fiercest anger of all, the most incurable,
Is that which rages in the place of dearest love.

Get rid of all bitterness, rage and anger, brawling and slander, along with every form of malice

I had a lot of mixed emotions -- anger and bitterness (and) a lot of questions that were not answered.