The Christian life has been rightly reckoned as a war. The enemy is clearly defined as a spiritual war headed by Satan (Eph. 6:12). Some of his goals include an unceasing attempt to devour (1 Pet. 5:8), destroy (Job 2:3); kill (Jn. 8:44); blind people from the truth (2 Cor. 4:4); and keep them from coming to God (Gal. 4:8). In other words, the identity, intentions, and capabilities of our enemy are clearly known. We have solid, credible intel on him.
Don't Bring a Plastic Spoon to a Knife Fight by Erik Raymond