Jesus Christ, Mediator.

Jesus Christ is our Mediator. A mediator is a person who tries to make people come to an agreement or makes it so that the price is met. Doctrine and Covenants 76: 69 says, "men made perfect through Jesus the mediator of the new covenant, who wrought out this perfect atonement through the shedding of his own blood." Through His Atonement, He agreed to be our Mediator—that is, if we agreed to do our best to the best of our abilities, He would make up the rest. He already paid the price—we just need to do our best to get back to Him and He will make up the rest. There is a video that explains this perfectly here:

http://broadcast.lds.org/video/BookOfMormon_Presentations/BM_GospelDoctrine_Video_05_Lesson30_Mediator_04396_eng_1M.mp4

Like the man in debt, we, too, are in debt—not monetary debt, but a debt of sin. With Jesus as our Mediator, we will be able to come clean through His Atonement if we choose to accept Him as our personal Savior.