It’s always so difficult to see bitterness when you are feeling it, yet so easy to see in other people. Bitterness truly is a root that grows deep if you allow and the poison seeps everywhere. It even spills out to others around you, if you aren’t careful. Search your heart earnestly. When you identify a thorny root, pray for the person who is the source of bitterness and allow God to do His work. It’s not fun being consumed by poison.
Look after each other so that none of you fails to receive the grace of God. Watch out that no poisonous root of bitterness grows up to trouble you, corrupting many.
~ Hebrews 12:15 [NLT]