Doctrine & Covenants 121:39-42

We have learned by sad experience that it is the nature and disposition of almost all men, as soon as they get a little authority, as they suppose, they will immediately begin to exercise unrighteous dominion.  Hence many are called, but few are chosen. No power or influence can or ought to be maintained by virtue of the priesthood, only by persuasion, by long-suffering, by gentleness and meekness, and by love unfeigned; by kindness, and pure knowledge, which shall greatly enlarge the soul without hypocrisy, and without guile.