What does Ephesians 3:10 mean?
The revealing of the mystery in their generation had great implications (Ephesians 3:3–6). Paul wrote that the community of Christian believers—the church—was the means to reveal the wisdom of God in this mystery. Interestingly, this specific revelation is made to "rulers and authorities in the heavenly places." Who are these rulers and authorities? The mention of heavenly places includes the spiritual realm (Ephesians 6:12). Those in the spiritual realm could only include God (Father, Son, and Spirit), holy angels, Satan, and demons. Since the focus is on revelation, and God already knows all things, Paul appears to be speaking of angels.Paul's implication is that God's wisdom is becoming known, even among angels of the spiritual realm, as a result of what is taking place through the church. Ephesians 6:12 suggests that this includes both loyal angels and the fallen angels, who serve Satan, who is also a fallen angel. This also means angelic beings are not omniscient; they can learn and grow in wisdom. Certain mysteries of God have been hidden from those in the spiritual realm as well. First Peter 1:12 also mentions that there are certain "things into which angels long to look."
Ephesians 3:1–13 explains Paul's ministry in the context of God's revealed mystery. Paul was called as a minister to the Gentiles, though he preached to anyone who would listen. Prior to this calling, however, he had persecuted the church as an unbeliever. Only God's divine grace saved Paul, and only God's divine grace causes the family of the church to grow. Even angels are learning more about the mysteries of God as they observe Him working through His church.
Ephesians chapter 3 wraps up Paul's doctrinal teaching and introduces its practical application. Paul refers to both his imprisonment and to his spiritual calling. This calling includes proclaiming the fact that all people, Jew and Gentile, can now be part of the same spiritual family. Paul also prays for the spiritual strength of the Ephesian church, as he prepares to explain how knowledge about Christ should translate into living for Christ.