The solemn testimony of the Three Witnesses has appeared in every edition of the Book of Mormon since 1830. Each of these specific men—Oliver Cowdery, Martin Harris, and David Whitmer—sacrificed much to help with the translation and publication of the Book of Mormon, and it’s likely this is a significant part of why they were chosen as witnesses. Importantly, throughout their lives and even during periods of estrangement from the church, none of them ever denied their testimonies. Their joint vision of the gold plates, the angel who delivered and presented them, the voice from heaven confirming their truth, and the other artifacts which accompanied them provide powerful evidence that the Book of Mormon is true.