“How thankful we ought to be ... how thankful we are, for a prophet to counsel us in words of divine wisdom as we walk our paths in these complex and difficult times. The solid assurance we carry in our hearts, the conviction that God will make his will known to his children through his recognized servant is the real basis of our faith and activity. We either have a prophet or we have nothing: and having a prophet, we have everything” (Teachings of Gordon B. Hinckley, pgs. 499–500).

Pornography

(1) "Pornography is like a raging storm, destroying individuals and families, utterly ruining what was once wholesome and beautiful."
(Presidente Gordon B. Hinckley, A Tragic Evil among Us, Ensign, Nov 2004)

(2) " Participation in pornography in any of its lurid forms is a manifestation of unbridled selfishness. How can a man, particularly a priesthood bearer, not think of the emotional and spiritual damage caused to women, especially his wife, by such abhorrent activity?"
(Elder Richard G. Scott, To Acquire Spiritual Guidance, Ensign, Nov 2009)

(3) "My brothers and sisters, involvement in such will literally destroy the spirit. Be strong. Be clean. Avoid such degrading and destructive types of content at all costs—wherever they may be! I sound this warning to everyone, everywhere."
(Presidente Thomas S. Monson, Until We Meet Again, Ensign, May 2009)

(4) "In our day the dreadful influence of pornography is like unto a plague sweeping across the world, infecting one here and one there, relentlessly trying to invade every home, most frequently through the husband and father. The effect of this plague can be, unfortunately often is, spiritually fatal. Lucifer seeks to disrupt “the great plan of redemption,” 11 “the great plan of happiness.” 12
Pornography will always repel the Spirit of Christ and will interrupt the communications between our Heavenly Father and His children and disrupt the tender relationship between husband and wife.
(President Boyd K. Packer, Cleansing the Inner Vessel, General Conference, October 2010)

(5) “Pornographic or erotic stories and pictures are worse than filthy or polluted food. The body has defenses to rid itself of unwholesome food. With a few fatal exceptions, bad food will only make you sick but do no permanent harm. In contrast, a person who feasts upon filthy stories or pornographic or erotic pictures and literature records them in this marvelous retrieval system we call a brain. The brain won’t vomit back filth. Once recorded, it will always remain subject to recall, flashing its perverted images across your mind and drawing you away from the wholesome things in life.”
(Elder Dallin H. Oaks, Pornography, Ensign May 2005)

(6) "(Pornography) And sin it is. It is devilish. It is totally inconsistent with the spirit of the gospel, with personal testimony of the things of God, and with the life of one who has been ordained to the holy priesthood."
(Presidente Gordon B. Hinckley, A Tragic Evil among Us, Ensign, Nov 2004)

(7) "Satan has become a master at using the addictive power of pornography to limit individual capacity to be led by the Spirit. The onslaught of pornography in all of its vicious, corroding, destructive forms has caused great grief, suffering, heartache, and destroyed marriages. It is one of the most damning influences on earth."
(Elder Richard G. Scott, To Acquire Spiritual Guidance, Ensign, Nov 2009)

(8) "My beloved friends, under no circumstances allow yourselves to become trapped in the viewing of pornography, one of the most effective of Satan’s enticements. And if you have allowed yourself to become involved in this behavior, cease now. Seek the help you need to overcome and to change the direction of your life. Take the steps necessary to get back on the strait and narrow, and then stay there."
(Presidente Thomas S. Monson, Until We Meet Again, Ensign, May 2009)

(9) " And young women, please understand that if you dress immodestly, you are magnifying this problem by becoming pornography to some of the men who see you."
(Elder Dallin H. Oaks, Pornography, Ensign May 2005)

(10) "Parents, be aware that the addiction of pornography can begin with youth at a very early age. Take preventative action to avoid that tragedy." 
(Elder Richard G. Scott, To Acquire Spiritual Guidance, Ensign, Nov 2009)

(11) " The bright sunlight of heaven, the rich blessings of earth are ours. In our private forest of family and friends, life is richly rewarding and abundantly beautiful. Then suddenly, there appears before us in this generation a sinister and diabolical enemy—pornography. Like the bark beetle it too is the carrier of a deadly disease. I shall name it “pernicious permissiveness.”
     "At first we scarcely realize we have been infected. We laugh and make light-hearted comment concerning the off-color story or the clever cartoon. With evangelical zeal we protect the so-called rights of those who would contaminate with smut and destroy all that is precious and sacred. The beetle of pornography is doing his deadly task—undercutting our will, destroying our immunity, and stifling that upward reach within each of us."
 (Presidente Thomas S. Monson, Pornography - the Deadly Carrier, General Conference, Oct 1979)