Ephesians 4:31, “Let all bitterness and wrath and anger and clamor and slander be put away from you, along with all malice.

Bitterness is a powerful, dangerous thing. Left unchecked, it can completely consume a person’s life. The Bible describes it this way:
• Bitter conditions in our lives, the terrible circumstances and mistreatment that we all face as a part of living in a broken world
• A bitter heart that wells up within us as we fail to process our hurt biblically
• Bitter words and actions that hurt ourselves and others

In fact, there are 3 categories of bitterness:
1. There is a bitter lifestyle, a person who, like Esau (Heb.12:16), lives with such bitterness that it produces observable behaviors.
2. There is also a bitter heart lurking under the surface. This bitter heart is the source of bitter words and actions.
3. The final category is bitter conditions. These are horrible circumstances that happen in our lives that are indeed bitter, but the way that we handle these circumstances can either lead to or prevent bitterness in the heart.

Bitterness is formed from one frustration, bitterness develops in your hearts as you replay frustrations and disappointments and hurts over and over again.