Their hearts accept Mormon teachings. If a Mormon does not accept those teachings, he/she would leave or become inactive.
Book of Mormon
1 Nephi 13
Nephi sees in vision the church of the devil set up among the Gentiles, the discovery and colonizing of America, the loss of many plain and precious parts of the Bible, the resultant state of gentile apostasy, the restoration of the gospel, the coming forth of latter-day scripture, and the building up of Zion. About 600–592 B.C.
Nephi sees in vision the church of the devil set up among the Gentiles, the discovery and colonizing of America, the loss of many plain and precious parts of the Bible, the resultant state of gentile apostasy, the restoration of the gospel, the coming forth of latter-day scripture, and the...
www.churchofjesuschrist.org
1 Nephi 14
An angel tells Nephi of the blessings and cursings to fall upon the Gentiles—There are only two churches: the Church of the Lamb of God and the church of the devil—The Saints of God in all nations are persecuted by the great and abominable church—The Apostle John will write concerning the end of the world. About 600–592 B.C.
An angel tells Nephi of the blessings and cursings to fall upon the Gentiles—There are only two churches: the Church of the Lamb of God and the church of the devil—The Saints of God in all nations are persecuted by the great and abominable church—The Apostle John will write concerning the end of...
www.churchofjesuschrist.org
Doctrine and Covenants 1 (also Mormon scrIpture)
17 Wherefore, I the Lord,
knowing the calamity which should come upon the
inhabitants of the earth,
called upon my
servant Joseph Smith, Jun., and
spake unto him from heaven, and gave him
commandments;
.....
29 And after having received the record of the Nephites, yea, even my servant Joseph Smith, Jun., might have power to
translate through the
mercy of God, by the power of God, the
Book of Mormon.
30 And also those to whom these commandments were given, might have
power to lay the foundation of this
church, and to bring it forth out of obscurity and out of
darkness, the only true and living
church upon the face of the whole earth, with which I, the Lord, am well
pleased,
speaking unto the church collectively and not individually,
.https://www.churchofjesuschrist.org/study/scriptures/dc-testament/dc/1?lang=eng
I hope these very few quotes are helpful.