Seventh-day Adventist Church / Cơ Đốc Phục Lâm
Holding on to bitterness can mean big trouble. It's in the Bible, Hebrews 12:15, TLB. "Look after each other so that not one of you will fail to find God's best blessings. Watch out that no bitterness takes root among you, for as it springs up it causes deep trouble, hurting many in their spiritual lives."