B. H. Roberts discusses how the Book of Mormon testifies of Christ.
B. H. Roberts, "New Dispensation Thoughts," Deseret News (October 25, 1930): [1]
THE heart of the Book of Mormon—the American Volume of Scripture—is as testimony for the Christ. The record gives the account of the fulfillment of the signs promised to the Nephite people of the birth and death of the Christ. The signs of the death were to be three days of darkness with great disturbances, storms, earthquakes, the sea heaving itself beyond it's bounds, etc. etc., all which were fulfilled. These things having passed, darkness and silence brooded over the land, and there was heard—may we say broadcasted—the voice of the Christ in every part of the land, saying:
[Quotation of 3 Nephi 9:15–22]