One concept that is repeatedly taught in the Book of Mormon is that the righteous who have fallen away from the truth will be faced with the truth before the bar of God. While looking the Savior in the face, their pangs of guilt will be piercing. This is eloquently expressed in the following passages:
'Therefore if that man repenteth not, and remaineth and dieth an enemy to God, the demands of divine justice do awaken his immortal soul to a lively sense of his own guilt, which doth cause him to shrink from the presence of the Lord, and doth fill his breast with guilt, and pain, and anguish, which is like an unquenchable fire, whose flame ascendeth up forever and ever.' (Mosiah 2:38)
'The spirit and the body shall be reunited again in its perfect form; both limb and joint shall be restored to its proper frame, even as we now are at this time; and we shall be brought to stand before God, knowing even as we know now, and have a bright recollection of all our guilt.' (Alma 11:43)
John Taylor
"God has made each man a register within himself, and each man can read his own register, so far as he enjoys his perfect faculties. This can be easily comprehended.
"…Let your memories run back, and you can remember the time when you did a good action, you can remember the time when you did a bad action; the thing is printed there, and you can bring it out and gaze upon it whenever you please.
"…Man sleeps the sleep of death, but the spirit lives where the record of his deeds is kept--that does not die--man cannot kill it; there is no decay associated with it, and it still retains in all its vividness the remembrance of that which transpired before the separation by death of the body and the ever-living spirit. Man sleeps for a time in the grave, and by-and-by he rises again from the dead and goes to judgment; and then the secret thoughts of all men are revealed before Him with whom we have to do; we cannot hide them; it would be in vain for a man to say then, I did not do so-and-so; the command would be, Unravel and read the record which he has made of himself, and let it testify in relation to these things, and all could gaze upon it. If a man has acted fraudulently against his neighbor--has committed murder, or adultery, or any thing else, and wants to cover it up, that record will stare him in the face, he tells the story himself, and bears witness against himself. It is written that Jesus will judge not after the sight of the eye, or after the hearing of the ear, but with righteousness shall he judge the poor, and reprove with equity the meek of the earth. It is not because somebody has seen things, or heard anything by which a man will be judged and condemned, but it is because that record that is written by the man himself in the tablets of his own mind--that record that cannot lie--will in that day be unfolded before God and angels, and those who shall sit as judges." (Journal of Discourses, pp. 77-9)