Mosiah 16:11 - 16:15
Mosiah 16:11 If they be good, to the resurrection of endless life and happiness; and if they be evil, to the resurrection of endless damnation, being delivered up to the devil, who hath subjected them, which is damnation—
Again if their works were for the benefit of their people then they would be resurrected to a life of happiness and peace. But if they did only evil then they would be resurrected to a life of being lead by satan and the misery that go with being subject to him.
Mosiah 16:12 Having gone according to their own carnal wills and desires; having never called upon the Lord while the arms of mercy were extended towards them; for the arms of mercy were extended towards them, and they would not; they being warned of their iniquities and yet they would not depart from them; and they were commanded to repent and yet they would not repent.
This misery would be because the individual has only spent his life following his own passions and selfish desires. They refused to seek the Lord for direction in their lives and the protection and guidance of the Lord was not available. The Lord will show them that many times He tried to get their attention to change their ways, but they refuse to listen. All are told to repent and the result of not doing so.
Mosiah 16:13 And now, ought ye not to tremble and repent of your sins, and remember that only in and through Christ ye can be saved?
This should scare anyone and cause them to see the path they are on is destroying them and that Christ is their only way out.
Mosiah 16:14 Therefore, if ye teach the law of Moses, also teach that it is a shadow of those things which are to come—
So the bottom line is if one teaches the law of Moses, they must teach that it is a precursor to the gospel of Christ and an example of what His sacrifice will consist of and what it will accomplish.
Mosiah 16:15 Teach them that redemption cometh through Christ the Lord, who is the very Eternal Father. Amen.
So those who teach the law of Moses must teach that redemption comes through Christ who is the Eternal Father.