“The battle is not yours, but God’s.” 2 Chronicles 20:15
This verse comes from a story in the bible where the Israelites were about to do battle with a large army. The Lord spoke to the king and told him, “Do not be afraid or dismayed because of this great multitude, for the battle is not yours, but God’s.” The king gathered the singers and when they went out to do battle he had them sing, “Praise the Lord, for His mercy endures forever!” When the people they were fighting heard the singing they became confused and defeated each other so that the Israelites won the battle.
If you are in a battle, and especially if it seems everything is stacked against you, do all you can to trust God and sing His praises. He will deliver you.