“Prayer for peace in my heart” is partially based on Ephesians 2:13-18 which speaks about how Jesus is our only true peace. He makes peace between you and God by ending all conflict and hostility. But beyond just an end to disagreement, true peace is a unified heart. Pray for peace in your heart and God will give it to you.
When it seems as if your life is falling apart, this prayer can encourage you to seek God. Many times the true battle is about how we see things. Let God change your heart and watch your life be transformed.
"Take my yoke upon you and learn from me, for I am gentle and humble in heart, and you will find rest for your souls. For my yoke is easy and my burden is light.” Matthew 11:30 "Cast your cares on the LORD and he will sustain you; he will never let the righteous fall." Psalm 55:22