Mosiah 2

King Benjamin outlines the way to misery and the way to happiness, teaching -

"...I say unto you, my brethren, that after ye have known and have been taught all these things, if ye should transgress and go contrary to that which has been spoken, that ye do withdraw yourselves from the Spirit of the Lord, that it may have no place in you to guide you in wisdom's paths that ye may be blessed, prospered, and preserved—
37 I say unto you, that the man that doeth this, the same cometh out in open rebellion against God; therefore he listeth to obey the evil spirit, and becometh an enemy to all righteousness; therefore, the Lord has no place in him, for he dwelleth not in unholy temples.
38 Therefore if that man repenteth not, and remaineth and dieth an enemy to God, the demands of divine justice do awaken his immortal soul to a lively sense of his own guilt, which doth cause him to shrink from the presence of the Lord, and doth fill his breast with guilt, and pain, and anguish, which is like an unquenchable fire, whose flame ascendeth up forever and ever.
39 And now I say unto you, that mercy hath no claim on that man; therefore his final doom is to endure a never–ending torment."  (Book of Mormon | Mosiah 2:36 - 39)

On the contrary -

"And moreover, I would desire that ye should consider on the blessed and happy state of those that keep the commandments of God.  For behold, they are blessed in all things, both temporal and spiritual; and if they hold out faithful to the end they are received into heaven, that thereby they may dwell with God in a state of never–ending happiness."  (Book of Mormon | Mosiah 2:41)

Most of us focus only in the pursuit of happiness in this life.  Not to types in the eternity..."never-ending torment" and "never-ending happiness".  Obviously the latter is most important.