Many churches throughout the world use a Bible reading schedule called a "lectionary." It's just a fancy word meaning "selected readings." Posts like this reflect on the readings for an upcoming Sunday or other Church holiday, as found in the three-year lectionary.
On Trinity Sunday we regularly make special notice of the Trinity - one God in three persons, Father, Son, and Holy Spirit. Our passage from Acts 2:22-36 does just this. Father, Son, and Spirit are presented in unity but with different roles. The roles are not a sign of different ranks or values. They merely represent different activities.
Here we find the Father showing works that affirm who the Son is and explore his deity. He raises the Son from the dead. He promises that the Christ will sit on David’s throne. He sends the Holy Spirit through the Son. The Father is God, acting in this role.
In our passage we also see the Son, having brought forth miraculous works, being crucified, killed, and raised from the dead, remarkably passive roles. However, having received “the promise of the Holy Spirit” (v. 33b, ESV), he then sends the Holy Spirit upon the believers. The Son is God, acting in this role.
Finally, we see the Holy Spirit, who, poured out on the discipoles, has provoked them to declare God’s mighty works in the native languages of the many onlookers, even though the discipoles themselves didn’t know those languages. The Spirit is God, acting in this role.
One God in three persons appears in this passage. The purpose is the same - to make much of God’s glory among all nations. This is the work of God.
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