A bitter person has allowed outward circumstances to determine his attitude. Some common statements that bitter people make are:
“I’ll never forget what they did.”
“Why is God doing this to me?”
“They don’t deserve another chance.”
"Often a person behaves badly because of jealousy and anger. It's not about you at all. It's about them. They simply target you. It doesn't matter that the person doesn't even know you or anything about you. Remember, it's not about you. They aren't angry at you. They aren't bitter at you. They are angry with their life and bitter about their life. They might very well be jealous of you however. Often when a person has chronic anger issues, they are often jealous of the peace that you have. They don't understand how you can be so at peace ... when they are so filled with rage and hate and take it out on you, yet you don't return that rage and anger to them. That in itself makes them angrier because they want that peace. But instead of seeking that peace, they attack you even further, all in vain attempts to make themselves feel better, but only sinking themselves deeper into an anger filled pit."