1 Corinthians 5

As Alma, the presiding High Priest, struggled with what to do with those that had committed grevious sins, that would not repent, the Lord instructed -

"...Go; and whosoever transgresseth against me, him shall ye judge according to the sins which he has committed; and if he confess his sins before thee and me, and repenteth in the sincerity of his heart, him shall ye forgive, and I will forgive him also." (Book of Mormon | Mosiah 26:29)

But -

"...whosoever will not repent of his sins the same shall not be numbered among my people..." (Book of Mormon | Mosiah 26:32)

In that -

"...those that would not confess their sins and repent of their iniquity, the same were not numbered among the people of the church, and their names were blotted out." (Book of Mormon | Mosiah 26:36)

As Paul writes to the Corinthians, he also preaches this same doctrine as he learns of serious transgressions are taking place where -

"IT is reported commonly that there is fornication among you..." (New Testament | 1 Corinthians 5:1)

Knowing that immorality was very common place in Greek philosopy, the saints seemed to take this lightly where -

"...ye are puffed up, and have not rather mourned, that he that hath done this deed might be taken away from among you." (New Testament | 1 Corinthians 5:2)

Paul teaches this is a serious matter in that -

"In the name of our Lord Jesus Christ, when ye are gathered together, and my spirit, with the power of our Lord Jesus Christ,
5 To deliver such an one unto Satan for the destruction of the flesh, that the spirit may be saved in the day of the Lord Jesus." (New Testament | 1 Corinthians 5:4 - 5)

Herein we recognize that when sins of such a serious nature where the transgressors have not yet demonstrated "Godly sorrow", these individuals must be disciplined or even excommunicated in such a manner that through sincere repentance, they may still be saved. In other words -

"...Know ye not that a little leaven leaveneth the whole lump?
7 Purge out therefore the old leaven, that ye may be a new lump, as ye are unleavened." (New Testament | 1 Corinthians 5:6 - 7)

With that Paul suggests that we avoid influential friendships with those that promote wickedness wherefore -

"I wrote unto you in an epistle not to company with fornicators:
10 Yet not altogether with the fornicators of this world, or with the covetous, or extortioners, or with idolaters; for then must ye needs go out of the world.
11 But now I have written unto you not to keep company, if any man that is called a brother be a fornicator, or covetous, or an idolater, or a railer, or a drunkard, or an extortioner; with such an one no not to eat." (New Testament | 1 Corinthians 5:9 - 11)

I don't believe he is not teaching that we do not reach out to help the wicked to repent and be an example for them, but he warns not to affiliate or agree with such -

"Therefore put away from among yourselves that wicked person." (New Testament | 1 Corinthians 5:13)

Even though Paul's warnings are to all saints, I can't help but think of the challenges that face our highly influential youth.