Bitterness is a passive emotion stemming from accumulated anger and disappointment that hasn't been fully understood or processed. Unlike anger or jealousy, bitterness is less acute but more draining, affecting various aspects of life negatively. It results from holding onto grudges and resentment, creating a toxic emotional residue that traps individuals in a cycle of carrying unresolved anger, frustration, and disappointment. Bitterness forms a wall around the heart, leading to a negative outlook on life by allowing past pain to fester instead of addressing it directly.