His suffering was different than all other suffering before or since because He took upon Himself all of the penalties that had ever been imposed on the human family. Imagine that! He had no debt to pay. He had committed no wrong. Nevertheless, an accumulation of all of the guilt, the grief and sorrow, the pain and humiliation, all of the mental, emotional, and physical torments known to man—He experienced them all. There has been only One in all the annals of human history who was entirely sinless, qualified to answer for the sins and transgressions of all mankind and survive the pain that accompanied paying for them.
President Boyd K. Packer, "The Savior’s Selfless and Sacred Sacrifice", Ensign, April 2015
Today, a day that I'm in some pain myself, I had the thought come into my mind that Jesus Christ experienced this exact pain....my EXACT pain. So He knows what I am dealing with. Me. Me personally.
I have no understanding as to HOW He took on my sins and pain, along with every other person, living or passed or soon to be living, from countless worlds and not just this earth. But I know He did this. But the "how" isn't important right now. It's the "why" He did this that matters. He had no sin, He committed no mistakes, He had no regrets or shame, and He was not in pain or anguish. So why would He subject Himself to that? Why would He voluntarily bring all of that onto Himself? It's unfathomable.
Because He loves you and me! That's why....beyond even our understanding of what love is. He loves us, all of us, despite our follies and mistakes and sins and ignorance and rejection. He loves us...perfectly.
I am forever grateful to Him. Eternally grateful. Not only for Him going through my pain so that He knows how to help me, but especially for Him breaking those bands that would keep me from living with my Heavenly Father. Nothing, absolutely nothing, is of greater import than that.