The Book of Mormon is a study of interesting contrasts between those who hardened their hearts and those whose hearts were softened by the Spirit of the Lord. How does one have his or her heart softened under the influence of the Holy Ghost?
Nephi’s testimony provides an answer: “Having great desires to know of the mysteries of God, wherefore, I did cry unto the Lord; and behold he did … soften my heart that I did believe all the words which had been spoken by my father.” (1 Ne. 2:16; italics added.) – Marvin J. Ashton, “The Measure of Our Hearts,” Ensign (CR) November 1988