Helaman 3:35

35. Nevertheless they did fast and pray oft, and did wax stronger and stronger in their humility, and firmer and firmer in the faith of Christ, unto the filling their souls with joy and consolation, yea, even to the purifying and sanctification of their hearts, which sanctification cometh because of their yielding their hearts unto God.

Alma 5:19

19. I say unto you, can ye look up to God at that day with a pure heart and clean hands? I say unto you, can ye look up having the image of God engraven upon your countenances?

D&C 121:33-46

33. How long can rolling waters remain impure? What power shall stay the heavens? As well might man stretch forth his puny arm to stop the Missouri river in its decreed course, or to turn it up stream as to hinder the Almighty from pouring down knowledge from heaven upon the heads of the Latter Day Saints.
34. Behold, there are many called, but few are chosen. And why are they not chosen?
35. Because their hearts are set so much upon the things of this world, and aspire to the honors of men that they do not learn this one lesson:
36. That the rights of the priesthood are inseperably connected with the powers of heaven, and that the powers of heaven cannot be controlled nor handled only upon the principles of righteousness.
37. That they may be conferred upon us it is true, but when we undertake to cover our sins, or to gratify our pride, our vain ambition, or to exercise control, or dominion, or compulsion upon the souls of the children of men, in any degree of unrighteousness, behold, the heavens withdraw themselves, the spirit of the Lord is grieved and when it is withdrawn, amen to the priesthood or the authority of that man.
38. Behold, ere he is aware he is left unto himself to kick against the pricks, to persecute the Saints, and to fight against God.
39. 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.
40. Hence many are called but few are chosen.
41. 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.
42. By kindness, and pure knowledge which shall greatly enlarge the soul without hypocracy and without guile.
43. Reproving betimes with sharpness, when moved upon by the Holy Ghost, and then showing forth afterward an increase of love toward him whom thou hast reproved, lest he esteem thee to be his enemy.
44. That he may know that thy faithfulness is stronger than the cords of death.
45. And let they bowels, also, be full of charity towards all men and to the household of faith, and let virtue garnish thy thoughts unceasingly; then shall thy confidence wax strong in the presence of God, and the doctrine of the priesthood shall distill upon thy soul as the dews from heaven.
46. The Holy Ghost shall be thy constant companion, and thy scepter an unchanging scepter of righteousness and truth, thy dominion shall be an everlasting dominion, and without compulsory means it shall flow unto thee forever and ever.

D&C 4:1-7

1. Now behold, a marvelous work is about to come forth among the children of men.
2. Therefore, oh ye that embark in the service of God see that ye serve him with all your might mind and strength, that ye may stand blameless before God at the last day.
3. Therefore, if ye have desires to serve God ye are called to the work.
4. For behold, the field is white all ready to harvest, and lo, he that thrusteth in his sickle with his might, the same layeth up in store that he perisheth not, but bringeth salvation to his soul.
5. And faith, hope, charity, and love, with an eye single to the glory of God, qualify him for the work.
6. Remember faith, virtue, knowledge, temperance, patience, brotherly kindness, godliness, charity, humility, diligence.
7. Ask and ye shall receive, knock and it shall be opened unto you, amen.

Moroni 7:45-48

45. And Charity suffereth long, and is kind, and envieth not, and is not puffed up, seeketh not her own, is not easily provoked, thinketh no evil, and rejoiceth not in iniquity but rejoiceth in the truth, beareth all things, believeth all things, hopeth all things, endureth all things.
46. Wherefore, my beloved brethren, if ye have not charity ye are nothing, for charity never faileth, wherefore, cleave unto charity, which is the greatest of all, for all things must fail.
47. But charity is the pure love of Christ, and it endureth forever, and whoso is found posessed of it at the last day, it shall be well with him.
48. Wherefore, my beloved brethren, pray unto the father with all the energy of heart that you may be filled with this love which he hath bestowed upon all who are true followers of his son, Jesus Christ, that ye may become the sons of God, that when he shall appear we shall be like him for we shall see him as he is, that we may have this hope, that we may be purified even as he is pure, amen.