The Aaronic Priesthood holds “the key of the ministering of angels and the preparatory gospel; which gospel is the gospel of repentance and of baptism, and the remission of sins” (Doctrine and Covenants 84:26–27; see also Doctrine and Covenants 13:1; 107:20). The Aaronic Priesthood also “has power in administering outward ordinances” (Doctrine and Covenants 107:14).
The Aaronic Priesthood quorum theme can help each young man understand his divine identity and his purpose as a priesthood holder. Young men and their leaders repeat the theme at the beginning of quorum meetings and at other quorum gatherings. The theme reads as follows:
“I am a beloved son of God, and He has a work for me to do.
“With all my heart, might, mind, and strength, I will love God, keep my covenants, and use His priesthood to serve others, beginning in my own home.
“As I strive to serve, exercise faith, repent, and improve each day, I will qualify to receive temple blessings and the enduring joy of the gospel.
“I will prepare to become a diligent missionary, loyal husband, and loving father by being a true disciple of Jesus Christ.
“I will help prepare the world for the Savior’s return by inviting all to come unto Christ and receive the blessings of His Atonement.”
For more information about the purposes of the priesthood and priesthood keys, see chapter 3 of the General Handbook: Serving in The Church of Jesus Christ of Latter-day Saints.