We depend on God to fight our battles

2nd Chronicles 20:17
There will be no reason for you to fight in this case; stand still, and see the salvation of the Lord with you. O Judah and Jerusalem, do not be afraid or dismayed; Tomorrow go out against them, for the Lord will be with you.

Source

We must learn to depend on God, everything was created by Him and all things are subject to Him. We must learn to rely on the strength of our Lord, not ours, since wanting to achieve things by our own strength and not trusting in God can lead us to failure. When we trust Him, we must be calm and let Him work for us.

Source

When we learn to depend on God and cry out for help, He is there, hears us, and is ready to fight our battles. We should not make an effort to fight her because she is not ours, we have a Mighty Giant who goes before us and who faces whatever may come our way. Be quiet! The Lord tells us that he himself will show us his salvation.
We need not fear because our Wonderful God will always be with us.