Paul’s language for spiritual rulers
The phrase appears most clearly when Paul describes the Christian struggle. He says believers are not ultimately fighting other people, but are facing organised spiritual evil. “Principalities” and “powers” are part of Paul’s way of naming ranks or authorities in that unseen conflict (Ephesians 6:12).
The Greek words behind these terms are archē, meaning a rule, beginning, or ruling authority, and exousia, meaning authority or power to act. Paul’s point is not to give a detailed map of the spirit world. He wants Christians in Ephesus to see that evil is deeper than bad circumstances, human opponents, or personal effort alone.
For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places.
Not every use means evil spirits
Context matters. The KJV can use “powers” for human governing authorities too. In Romans 13, Paul tells Roman Christians to respect civil authorities because all rightful authority is accountable to God (Romans 13:1). So the word itself does not always mean a demon or hostile spiritual being.
But in Ephesians 6, the setting is plainly spiritual warfare. Paul speaks of rulers of darkness and spiritual wickedness, then urges believers to put on God’s armour. That means Christians should take evil seriously without becoming suspicious of every person, institution, or difficulty (Ephesians 6:11-13).
Wherefore take unto you the whole armour of God, that ye may be able to withstand in the evil day, and having done all, to stand.
Christ is above them
The Bible never treats principalities and powers as rivals who might overthrow God. Paul says that all things in heaven and earth, including thrones, dominions, principalities, and powers, were created through and for Christ (Colossians 1:16). Whatever spiritual authority exists, it is not independent of him.
Paul also says Christ disarmed hostile principalities and powers through the cross, openly displaying their defeat (Colossians 2:15). Christians differ on how much detail can be known about spiritual beings and their ranks. Still, the centre is clear: Jesus’ death and resurrection mean evil does not have the final word.
And having spoiled principalities and powers, he made a shew of them openly, triumphing over them in it.
How should we respond?
Paul’s response is wonderfully practical. Rather than telling people to chase hidden knowledge or live in fear, he tells them to be strong in the Lord, to hold to truth, righteousness, faith, salvation, prayer, and God’s word (Ephesians 6:10-18). Spiritual resistance is lived out in ordinary, faithful trust in Christ.
That also changes how we see people. A person is never simply the enemy. Christians can oppose evil while praying for others, refusing hatred, and seeking what is good. Paul says neither death, life, angels, principalities, nor powers can separate God’s people from his love in Christ (Romans 8:38-39).