Are Demons Real, and Can They Affect Christians?

The Bible clearly presents demons as real—fallen angels who serve the devil and oppose God and his people. Jesus cast them out repeatedly, treating them not as metaphors but as actual spiritual beings. Paul is explicit: “our struggle is not against flesh and blood, but against the rulers, against the powers, against the world rulers of this darkness, against the spiritual forces of evil in the heavens” (Ephesians 6:12, NET). So spiritual warfare is real, and it would be naïve to pretend otherwise.

But how Christians should relate to this needs Lutheran sobriety, because the topic invites two opposite errors. One is dismissal—ignoring the reality of evil spiritual powers entirely. The other, more common in some circles, is an obsession that sees demons everywhere, chases them through elaborate techniques, and lives in fear of curses and attacks. Scripture supports neither. It calls for alertness, not anxiety.

Here is where Lutherans locate the real “spiritual warfare,” and it is strikingly ordinary. Notice how Paul says the battle is actually fought in Ephesians 6: the armor is truth, righteousness, the gospel, faith, salvation, “and take the helmet of salvation and the sword of the Spirit (which is the word of God)” (Ephesians 6:17, NET), all soaked in prayer. The weapons are not exotic rituals but the Word, faith, and prayer—the very means of grace. The devil is resisted by clinging to Christ and his Word: “so submit to God. But resist the devil and he will flee from you” (James 4:7, NET). Where the Gospel is, the enemy cannot finally stand.

And the decisive fact frees us from fear: if you are in Christ, you have been “delivered…from the power of darkness and transferred…to the kingdom of the Son” (Colossians 1:13, NET). You belong to Christ, sealed in Baptism; the enemy has no rightful claim on you. When his disciples were thrilled that demons submitted to them, Jesus redirected their joy: “do not rejoice…but rejoice that your names stand written in heaven” (Luke 10:20, NET). Demons are real, but you need not fear them. Stay near the Word, pray for deliverance, resist in Christ’s name, and rest in the One who has already won.