The New Testament Has Two Different Greek Words for "Power" — and the Difference Matters

In Luke 10:19, Jesus makes a remarkable statement that contains both words: "I have given you authority [exousia] to tread on serpents and scorpions, and over all the power [dunamis] of the enemy."

Exousia (ἐξουσία) is delegated authority — the right to act in the name of a higher power. A police officer does not have to be physically stronger than every person they encounter. They carry the authority of the government that commissioned them. When Jesus delegates exousia to believers, He is granting the legal right to act on His behalf.

Dunamis (δύναμις) is raw power, inherent ability, or miraculous force. It is the word behind "dynamite." In Acts 1:8, Jesus promised His disciples would receive dunamis when the Holy Spirit came upon them — the explosive, miracle-working power of God Himself.

In Luke 10:19, the contrast is deliberate: Jesus gives His disciples exousia (authority) over all the enemy's dunamis (raw power). The enemy may have power — but authority outranks power. A single officer with a badge can stop a crowd. Authority over power is the operating principle of the Kingdom of God.

Matthew 28:18 uses exousia again: "All authority in heaven and on earth has been given to me." This is the foundation of the Great Commission — Jesus delegates authority He has received from the Father to His followers.