How do we know the existence of spiritual warfare?

The existence of spiritual warfare is underscored in Ephesians 6:12, which reveals that our struggles are primarily against spiritual forces rather than physical adversaries. This concept is foundational in Reformed theology, emphasizing that Satan is a real being who actively opposes God's people and seeks to hinder their faith. Furthermore, the Apostle Peter warns of the devil roaming like a roaring lion, seeking whom he may devour (1 Peter 5:8), highlighting the seriousness of this spiritual battle around us. Recognizing this allows Christians to take the necessary steps to equip themselves with the armor of God as a defense against these attacks.