Why must Christians prepare for spiritual warfare?

Ephesians 6:11-12 warns believers to put on the whole armor of God, highlighting the necessity of spiritual preparedness. The reality of spiritual warfare is underscored in Revelation 12, where Satan is depicted as actively pursuing the church. The scripture encourages Christians to recognize their struggle is not against flesh and blood but against spiritual powers. Therefore, it is vital for believers to equip themselves with truth, righteousness, faith, and the Word of God, as these are essential for standing firm in the face of challenges. By doing so, believers affirm their trust in God's sovereignty and their role in the ongoing battle between good and evil.