You now know about God’s great Plan of Happiness for all of us, His children.
But why did Christ have to suffer and die for us? Can’t we just work out our own salvation, or perhaps just pay our way into heaven?
In the pre-existence, when everyone lived with Heavenly Father as His spirit children, He knew that when we came to the earth we would make mistakes. And when we make mistakes or sin we are no longer clean and cannot go where He is. “And I say unto you again that he cannot save them in their sins; for I cannot deny his word, and he hath said that no unclean thing can inherit the kingdom of heaven; therefore, how can ye be saved, except ye inherit the kingdom of heaven? Therefore, ye cannot be saved in your sins.” Alma 11:37.
Heavenly Father wanted us to return to Him and He knew that we would not always choose the right. So He made a provision for His children whereby they could be redeemed if they wanted to. He set up a Savior who would pay for our sins, and He taught the principle of repentance. Christ taught, “And no unclean thing can enter into his kingdom; therefore nothing entereth into his rest save it be those who have washed their garments in my blood, because of their faith, and the repentance of all their sins, and their faithfulness unto the end.” 3 Nephi 27:19.
And what about buying our way into heaven? “He commandeth that there shall be no priestcrafts; for, behold, priestcrafts are that men preach and set themselves up for a light unto the world, that they may get gain and praise of the world; but they seek not the welfare of Zion” 2 Nephi 26:29.
Christ came to earth and lived a perfect life. Thus He was sinless and could atone for our sins. We accept His atonement when we repent of our sins and become washed clean “in [Christ’s] blood”.