Amulek then arose to add his testimony to that of Alma’s. He picked up where Alma had ended, by talking about the word. He wanted the people to have so much faith that they could plant the word in their hearts. Here, Amulek was standing as a second witness, but as Amulek usually did, he developed the idea a little further. In the following verses, he also called upon the words of Zenos who preached of the redemption that would come through the Son of God.
Amulek’s validating and further expounding of Alma’s testimony is a good example for missionaries. Even today, when one missionary teaches and testifies, the other missionary testifies to the truth of what was just taught. In this case, it was almost as though Alma gave the first missionary discussion, and Amulek gave the second, taking the principles ever further. Take the topic of faith for example. Alma taught the people to plant the seed, nourish it, let it grow, and it will bear fruit. Amulek took it even further and emphasized faith unto repentance. He also taught them to not procrastinate their repentance, so that they would have faith in the day of judgment, when they would stand before God to be judged.
Book of Mormon Central, “What Role Does the Book of Mormon Play in Missionary Work? (2 Nephi 30:3),” KnoWhy 288 (March 17, 2017).