We all fall short of the Glory of God. Mormon, Catholic, every denomination of Protestant or Jew, and all those in the unbelieving world. Stack all our good deeds up, the Biblical laws we have kept, and all the hours in church or on a mission trip, or in worship on Easter Sundays, and we have not come close to deserving what God has promised.
Our acceptance by God does not come from what church we join, or how good a life we live. The thief on the cross showed us that. By doing the unthinkable, the criminal asked Jesus to have mercy on him in spite of his worthless life. Keep in mind, he was in no position to bargain. There was no “from now on”, no turning over a new leaf for him. He was a dead man talking. He had come to an end of his miserable life. But 4 little heart-felt words “have mercy on me” had Jesus push up on the nail that pierced his feet so he could utter these words, “I tell you the truth, today you will be with me in paradise”
Those 4-words can be spoken by all human-kind, for he suffered on that cross for all of us. Even Mormons.
They sure can!
And when MORMONs finally do that; they become EX-mormons!
ALL their 'righteousness' will have become as filthy rags, and THEN they'll rely ONLY upon Jesus; the Author and Finisher of our faith; NOT upon any 'good works' that they think they have done.