We cant successfully fight demons in the flesh -- we do it in the spirit.
Jesus said, "I give you power and authority to trample on serpents and scorpions, and over all the power of the enemy, and nothing shall by any means harm you."
We havevto soeak to the demon, bind it up in the name of Jesus Christ, and send it into (not just "to" but into) the abyss.
Demons tremble at the name of Jesus Christ.
Full armor of God.
We don't run.
We stand and defend our ground.
Our weapon is the Word of God!
Doesn't do us any good unless we use it!