Some of the most well-worn pages of my mission Book of Mormon are the pages in the 36th chapter of Alma. Alma's recollection of his personal repentance story is one of the most poetic and beautiful descriptions of what it feels like to be free of sin.
Alma's account is so raw, and so honest. He doesn't hide anything from his son about the man he used to be, but he also doesn't hold back when he's speaking of how Jesus saved him.
I loved sharing this chapter with people I taught, and explaining how they would feel just as light and happy when they repented too. God loves us, and so he sent His son. He wants all of us to live unburdened.
20 "And oh, what joy, and what marvelous light I did behold; yea, my soul was filled with joy as exceeding as was my pain."