Finally, my brethren, be strong in the Lord, and in the power of his might. Put on the whole armour of God, that ye may be able to stand against the wiles of the devil.
Yes, there is a devil. I give him no glory, for all glory belongs to God. But the enemy is a powerful one. Not to be made light of, not to be forgotten, and not to think more highly of him than deserved. But we do have an enemy.
Not flesh and blood that we rail at one another,
For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places.
Jesus defeated the devil on the cross. Winning for all who believed in Him freedom from fear of death and the grave.
In Christ, we are victorious. Our Lord used scripture to overcome the temptations of the evil one. We can only defeat the enemy by His Spirit and Word. Not by our might or power.
So put your armor on daily. Be on guard against the enemies deceitful ways, and sharpen your sword - the Word of God.