2 Nephi 5:27
"And it came to pass that we lived after the manner of happiness."
"But behold there never was a happier time among the people of Nephi, since the days of Nephi, than in the days of Moroni, yea, even at this time, in the twenty and first year of the reign of the judges."
"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. O remember, remember that these things are true; for the Lord God hath spoken it."
4 Nephi 1:16
"And there were no envyings, nor strifes, nor tumults, nor whoredoms, nor lyings, nor murders, nor any manner of lasciviousness; and surely there could not be a happier people among all the people who had been created by the hand of God."
"I read the one in 2 Nephi and thought . . . What is the reason for this happiness? How do we get it? Here are cross references I found and studied. I want you to do the same. Read these (the chapters if you can) and look for the similarities in what brings happiness, and on the contrary, what causes unhappiness. Then strive to find this happiness!"