There's no such thing as a sleepy, successful soldier. They're all dead. God says if you want to succeed in spiritual war, you must be self-controlled and alert. Only then will you be able to spiritually discern and resist the enemy's subtle attacks. Maintain Faith in Christ.
Faith is absolutely critical to victory in spiritual conflict.
Christ imparts the capacity of conquest to our lives every single day that we are willing to believe Him. Conquer today through me. I believe in you. Give me victory. Take away my doubts.