The [purpose] of the Aaronic Priesthood is to help each young man -
Become converted to the gospel of Jesus Christ and live by its teachings.- Magnify priesthood callings.
Give meaningful service.
Prepare to receive the Melchizedek Priesthood.
Commit to, worthily prepare for, and serve an honorable full-time mission.
Live worthy to receive temple covenants and prepare to become a worthy husband and father.
Aaronic Priesthood Leadership Handbook, p. 6.