Gospel Principles Chapter 13: The Priesthood
"Blessings of the Priesthood"- A 3 minute video with words from Elder Robert D. Hales (Quorum of the 12 Apostles).
"The Powers of Heaven" by Elder David A. Bednar (Quorum of the 12 Apostles)- Ordination confers authority but righteousness confers the power. Also great story about his Dad (not LDS) and the things that he noticed about men with the priesthood and Elder Bednar's reaction.
"The Why of Priesthood Service" by President Dieter F. Uchtdorf (1st Presidency)- The What informs, the Why transforms.
"A Royal Priesthood" by President Thomas S. Monson (Prophet and President but 1st Presidency at the time)- The marks of a true Priesthood holder remain constant- the mark of vision, effort, faith, virtue, and prayer.