The imagery of a judicial system is often invoked when the Last Judgment is mentioned in scriptures. Man goes before the “judgment bar” (2 Nephi 33:15), there to be “arraigned” (Alma 11:44) and face God, “the Judge of all” (Hebrews 12:2). As part of that imagery, Jesus is called the Advocate (paraclaytos). In the King James Version of the New Testament, Jesus is called the “advocate” only once (1 John 2:1). The same word (paraclaytos) is used for the Holy Ghost, although it is translated “Comforter” (John 14:16). Thus, Jesus is one Paraclete, or Comforter, and the Holy Ghost is called “another Comforter” (John 14:16). The Greek word comes from para, to the side of, and kalayo, to summon. “Hence, originally, one who is called to another’s side to aid him, as an advocate in a court of justice” (Vincent, Word Studies, 1:486).
In the terminology of today’s legal system, an advocate is a lawyer who pleads another’s cause in a court of law, or in other words, an attorney for the defense. Usually, the attorney for the defense pleads the cause for his client on the basis that he is innocent; or if guilty, that extenuating circumstances should be considered and mercy extended. At the time of eternal judgment, men shall stand before the bar of God accused of being imperfect and unworthy to enter God’s presence, “for all have sinned, and come short of the glory of God” (Romans 3:23). At that time all men have an Advocate with the Father. He stands beside them to plead their cause before the Great Judge; however, he does not plead their case by pointing to their lack of guilt; rather, it is his own sinlessness to which he calls God’s attention (see D&C 45:4). His perfection and his suffering pay the price to satisfy justice for those of his “brethren that believe on my name” (D&C 45: 5). Imagine the indescribable sorrow of standing before the judgment bar with no one to step forward, no one to speak for you. What tragic foolishness that some will not come to him in true faith and repentance so that he can take their guilt upon him and become their advocate with the Father. — Doctrine and Covenants Student Manual, p. 92