Righteousness and faith certainly are instrumental in moving mountains - if moving mountains accomplishes God's purposes and is in accordance with His will.
The Savior has suffered not just for our iniquities but also for the inequality, the unfairness, the pain, the anguish, and the emotional distresses that so frequently beset us.
Many of the lessons we are to learn in mortality can only be received through the things we experience and sometimes suffer. And God expects and trusts us to face temporary mortal adversity with His help so we can learn what we need to learn and ultimately become what we are to become in eternity.
We will not attain a state of perfection in this life, but we can and should press forward with faith in Christ along the strait and narrow path and make steady progress toward our eternal destiny.
Nothing about the priesthood is self-centered. The priesthood always is used to serve, to bless, and to strengthen other people.
Within the walls of our own homes, we can and should bear pure testimony of the divinity and reality of the Father and the Son, of the great plan of happiness, and of the Restoration.