In conclusion be strong—not in yourselves but in the Lord, in the power of His boundless resource. Put on God’s complete armour so that you can successfully resist all the devil’s methods of attack. For our fight is not against any physical enemy: it is against organisations and powers that are spiritual. We are up against the unseen power that controls this dark world, and spiritual agents from the very headquarters of evil.

Ephesians 6:10-13 (J. B. Phillips)