Our spiritual adversary, though he be a false teacher, resembles other teachers in that he knows whether or not we have done our homework. He definitely knows whether our spiritual swords are sharp, having seen and felt so may dull blades through the ages. After all, he is the one who deceived Adam and Eve in the garden, kidnapped humanity, hijacked the earth, and then proceeded to ransack it.
In the fullness of time though, came our Redeemer to earth to undo that curse and to pay the ransom, liberating us once and for all. One might say he paid that ransom price with blood marked bills, marked as it were with his very own blood. When the enemy goes to spend them, he will be identified and apprehended, and locked away for a thousand years!