Lessons from the story of Zeezrom (Alma 15)

Sometimes we feel that our sins are so great that we can't be
forgiven. Such was Zeezrom's case. He felt his opposition to the
Church had led to the death of Alma and Amulek and others. However,
even in his situation, his faith in Christ was enough that he was
forgiven and also healed. See Alma 15
<http://scriptures.lds.org/en/alma/15>.

5 and they went in unto the house unto Zeezrom; and they found him
upon his bed, sick, being very low with a burning fever; and his mind
also was exceedingly sore because of his iniquities; and when he saw
them he stretched forth his hand, and besought them that they would
heal him.
6 And it came to pass that Alma said unto him, taking him by the hand:
Believest thou in the power of Christ unto salvation?
7 And he answered and said: Yea, I believe all the words that thou hast taught.
8 And Alma said: If thou believest in the redemption of Christ thou
canst be healed.
9 And he said: Yea, I believe according to thy words.
10 And then Alma cried unto the Lord, saying: O Lord our God, have
mercy on this man, and heal him according to his faith which is in
Christ.
11 And when Alma had said these words, Zeezrom leaped upon his feet,
and began to walk; and this was done to the great astonishment of all
the people; and the knowledge of this went forth throughout all the
land of Sidom.
12 And Alma baptized Zeezrom unto the Lord; and he began from that
time forth to preach unto the people.

We also learn in this chapter that sometimes when people accept the
gospel that their family rejects them. Such was the experience of
Amulek. (Alma 15:16)