 The Word of God is your greatest weapon against the voice of the satanic. Think about Jesus in Matthew chapter 4 when he was being tempted in the wilderness. Whenever the enemy would speak, Jesus would reply with the word and he would say, It is written. So that's how you combat the deceptive communications of the enemy through the Word of God. But if you don't know the word, you're not going to have truth to which you can compare the lies. If you don't have a standard, you'll never know if you're off standard. You need the Word of God as the reference for truth so that when demonic powers try to lie to you, you can recognize those deceptions because right there it is written.