"whether the word be in the Son of God, or whether there shall be no Christ" Alma 34:5
Amulek goes on to say that Alma, his teaching companion along with Zenos, Zenoch and Moses had "proved unto you, in many instances, that the word is in Christ unto salvation."
He then goes on to teach and testify from his own witness. Before going on to teach of the proper use of prayer he ends with this.
14 And behold, this is the whole meaning of the law, every whit pointing to that great and last sacrifice; and that great and last sacrifice will be the Son of God, yea, infinite and eternal.
15 And thus he shall bring salvation to all those who shall believe on his name; this being the intent of this last sacrifice, to bring about the bowels of mercy, which overpowereth justice, and bringeth about means unto men that they may have faith unto repentance.
16 And thus mercy can satisfy the demands of justice, and encircles them in the arms of safety, while he that exercises no faith unto repentance is exposed to the whole law of the demands of justice; therefore only unto him that has faith unto repentance is brought about the great and eternal plan of redemption.
17 Therefore may God grant unto you, my brethren, that ye may begin to exercise your faith unto repentance, that ye begin to call upon his holy name, that he would have mercy upon you;
This is such a powerful testimony to me of Christ. Such clarity that I have found about the doctrine of the fall, of justice and mercy and grace and exercising faith unto repentance. What a gift!