Yes, your battle may be greater than you, but God will never lead you where is grace cannot keep you. Nor will he lead you on the battle field without equipping you. But as a good soldier of Jesus Christ you must be prepared to endure (2 Timothy 2:3). God is with you and will go with you. Only believe. God is on your side.
When you think all hope is loss...look inside of you; listen to the voice deep with in saying, "My Child, you are not alone. Be not a afraid I am with you."
"Fear thou not; for I am with thee: be not dismayed; for I am thy God: I will strengthen thee; yea, I will help thee; yea, I will uphold thee with the right hand of my righteousness" (Isaiah 41:10).
Sometimes our battle is only as big as we perceive it. But no matter how great know that Jehovah is with you! Through God we shall do valiantly: for he it is that shall tread down our enemies (Psalm 108:13).