Our enemies are demonic, but the warfare against them isn’t waged by commanding them, mapping their physical location, invoking magic words to subdue them, claiming authority over them, or any of the other common tactics some people usually refer to as “spiritual warfare.” We are not fighting demons in a face-to-face confrontation, or by spirit-to-spirit conversation, or with voice-to-voice communication. We attack them by tearing down their fortresses of lies… What, precisely, are our weapons? The only power that will destroy such things is the power of truth…“the sword of the Spirit, which is the word of God” (Eph. 6:17).
John MacArthur