How does Christ execute the office of a king?

Answer

Christ executes the office of a king in subduing us to Himself (), in ruling and defending us (; ), and in restraining and conquering all His and our enemies.

Read the 3 proof texts (KJV)

Psalm 110:3: Thy people [shall be] willing in the day of thy power, in the beauties of holiness from the womb of the morning: thou hast the dew of thy youth.
Matthew 2:6: And thou Bethlehem, [in] the land of Juda, art not the least among the princes of Juda: for out of thee shall come a Governor, that shall rule my people Israel.
1 Corinthians 15:25: For he must reign, till he hath put all enemies under his feet.