Esther 5

"Haman was a happy man as he left the banquet! But when he saw Mordecai sitting at the palace gate, not standing up or trembling nervously before him, Haman became furious." v. 9
Hatred and bitterness are like weeds with long roots that grow in the heart and corrupt all of life. Haman was so consumed with hatred toward Mordicai that he could not even enjoy the honor of being invited to Esther's party. Hebrews 12:15 warns us to "watch out that no poisonous root of bitterness grows up to trouble you, corrupting many." Don't let hatred and it's resulting bitterness build in your heart. Like Haman, you will find it backfiring against you. If the mere mention of someone's name provokes you to anger, confess your bitterness as sin. Ignoring bitterness, hiding it from others or making superficial changes in behavior is not enough. I bitterness isn't completely removed, it will grow back, making matters worse.

Taken from the NLT Life Application Study Bible