Perhaps the most well-known passage in the Book of Mormon is found in the last chapter:

"And when ye shall receive these things, I would exhort you that ye would ask God, the Eternal Father, in the name of Christ, if these things are not true; and if ye shall ask with a sincere heart, with real intent, having faith in Christ, he will manifest the truth of it unto you, by the power of the Holy Ghost."And by the power of the Holy Ghost ye may know the truth of all things." (Moro. 10:4-5.)

Elder Boyd K. Packer of the Council of the Twelve discussed the power of the Holy Ghost at a seminar for new mission presidents June 25, 1982:

"We do not learn spiritual things in exactly the same way we learn other things that we know, even though such things as reading, listening, and pondering may be used. I have learned that it requires a special attitude both to teach and to learn spiritual things. There are some things you know, or may come to know that you will find quite difficult to explain to others. I am certain it was meant to be that way. . . .

"We cannot express spiritual knowledge in words alone. We can, however, with words show another how to prepare for the reception of the Spirit. The Spirit itself will help. "For when a man speaketh by the power of the Holy Ghost the power of the Holy Ghost carrieth it unto the hearts of the children of men. . . .' (2 Ne. 33:1.)

"Then when we have a spiritual communication, we can say within ourselves, this is it! This is what is meant by those words in the revelation. Thereafter, if they are carefully chosen, words are adequate for teaching about spiritual things.

"We do not have the words (even the scriptures do not have the words) which perfectly describe the Spirit. The scriptures generally use the word voice, which does not exactly fit. These delicate, refined spiritual communications are not seen with our eyes, nor heard with our ears. And even though it is described as a voice, it is a voice that one feels, more than one hears.

"Once I came to understand this, one verse in the Book of Mormon took on a profound meaning, and my testimony increased immeasurably. It had to do with Laman and Lemuel, who rebelled against Nephi. Nephi rebuked them and said, `Ye have seen an angel, and he spake unto you; yea, ye have heard his voice from time to time; and he hath spoke to you in a still small voice, but ye were past feeling, that ye could not feel his words. . . .' (1 Ne. 17:45; italics added.)

"There may be more power in your testimony than even you realize. The Lord said to the Nephites: `Whoso cometh unto me with a broken heart and a contrite spirit, him will I baptize with fire and with the Holy Ghost, even as the Lamanites, because of their faith in me at the time of their conversion, were baptized with fire and with the Holy Ghost, and they knew it not. . . .' " (3 Ne. 9:20; italics added.)

"There is great power in this work, spiritual power. The ordinary member of the Church, like you, having received the gift of the Holy Ghost by confirmation, can do the work of the Lord.

"There is much more to say. I could speak of prayer, of fasting, of priesthood and authority, of worthiness - all essential to revelation. When they are understood, it all fits together - perfectly. But some things one must learn individually, and alone, taught by the Spirit."