“Get rid of all bitterness, rage and anger, brawling and slander, along with every form of malice.” (Ephesians 4:31)
Easier said than done. Yet, one thing that helps me with bitterness is remembering that bitterness is not of the Holy Spirit. So whatever the grudge or disappointment that I may be holding, I know for a fact that it is not of the Holy Spirit. So I hold it until the Lord shows me a path of escape. And that path is always his joy, his joy of saving me.
Bitterness is rooted in self-condemnation or the condemnation of others. Christ came not to condemn but to save. In saying this, it’s not of God to condemn myself and it’s not of God to condemn others.
Being bitter is like being blind of your joy. And nobody wants to be blind of their joy. Trust me. Nobody.