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.
The priesthood holds consummate power. It can protect you from the plague of pornography—and it is a plague—if you are succumbing to its influence. If one is obedient, the priesthood can show how to break a habit and even erase an addiction. Holders of the priesthood have that authority and should employ it to combat evil influences.
President Boyd K Packer, "Cleansing the Inner Vessel," General Conference Address, October 2010