Samuel warned the Nephites that they had been seeking happiness in doing iniquity, which is contrary to the nature of happiness. Speaking of this problem and how true happiness comes, Elder Richard G. Scott of the Quorum of the Twelve Apostles pointed out that happiness only comes with righteousness:
“Have you noticed how Satan works to capture the mind and emotions with flashing images, blaring music, and the stimulation of every physical sense to excess? He diligently strives to fill life with action, entertainment, and stimulation so that one cannot ponder the consequences of his tempting invitations. Think of it. Some are tempted to violate the most basic commandments of God because of seductive actions portrayed as acceptable. They are made to seem attractive, even desirable. There seems to be no serious consequence, but rather apparent lasting joy and happiness. But recognize that those performances are controlled by scripts and actors. The outcome of decisions made is likewise manipulated to be whatever the producer wants.
“Life is not that way. Yes, moral agency allows you to choose what you will, but you cannot control the outcome of those choices. Unlike the false creations of man, our Father in Heaven determines the consequences of your choices. Obedience will yield happiness, while violation of His commandments will not” (in Conference Report, Apr. 2004, 105; or Ensign, May 2004, 102).