We should be studying the ministries of Ammon and Aaron to learn about how to do missionary work. They are great examples. Aaron’s teachings could not be more exemplary. He teaches on the king’s level, teaches from the scriptures, and teaches the doctrine in the order in which it should be taught. A good missionary will not teach of Jesus Christ before teaching of the need for a redeemer. The importance of the Savior’s atonement cannot be understood without understanding the Fall, which in turn cannot be understood without understanding the creation of Adam. Hereby, we see the logic of Aaron’s teaching. The Creation story must precede the Fall which must precede the Atonement. Bruce R. McConkie calls these three doctrines, “the pillars of eternity.”
Henry B. Eyring
"Just as soil needs preparation for a seed, so does a human heart for the word of God to take root…Aaron, one of the great missionaries in the Book of Mormon, knew how to teach that way. You remember how he taught King Lamoni’s father, the old king. The king‘s heart had already been prepared by seeing love and humility in the way Aaron’s brother had treated Lamoni, his son. But even with that preparation of the old king’s heart, Aaron taught the word of God in a way to emphasize God’s love and our need for him: ’And it came to pass that when Aaron saw that the king would believe his words, he began from the creation of Adam, reading the scriptures unto the king—how God created man after his own image, and that God gave him commandments, and that because of transgression, man had fallen. And Aaron did expound unto him the scriptures from the creation of Adam, laying the fall of man before him, and their carnal state and also the plan of redemption, which was prepared from the foundation of the world, through Christ, for all whosoever would believe on his name.’ (Alma 22:12-13.)
"You won’t very often have the remarkable result that Aaron had. After hearing the word of God taught that way, in what the scriptures sometimes call the plan of happiness, the old king said that he would give whatever he had to root the wickedness out of him and have eternal life. When Aaron told him to cry to God in prayer for forgiveness, the king bowed down on the spot. The seed was planted. He was doing the will of God. (See verses 15-18.)
“When you touch the hearts of people you serve, you won’t do everything exactly the way Aaron did. But you will do some of the same things. You will try to help them feel that God loves them by the way you treat them. You will be humble so that they are more likely to choose to be meek and lowly of heart. You will teach the word of God, when the Spirit prompts you, in a way that testifies of God’s love for them and their need for the atonement of Jesus Christ. And you will teach them commandments they can keep. That is why, when you go into the mission field, you learn to commit those you teach to pray or to read the Book of Mormon or to come with you to a sacrament meeting or to be baptized. You know that when they keep commandments they plant the seed. And you know that it will grow, their souls will be expanded, and when that happens their faith will increase.” (To Draw Closer to God, pp. 187-8)