“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,” President Boyd K. Packer of the Quorum of the Twelve Apostles said. “The effect of this plague can be, unfortunately often is, spiritually fatal. Lucifer seeks to disrupt ‘the great plan of redemption,’ ‘the great plan of happiness.’”

President Packer
"Power to Overcome Pornography"