4 ... And the way is prepared from the fall of man, and salvation is free.The full benefits of the Atonement of Christ are offered to those who seek to accept Christ. These are those who are humble and contrite, who believe in Christ. That this should involve seeking to keep His commandments in no way implies that they earn this infinite gift of grace or no longer need grace. It's simply accepting the gift under the conditions of the covenant Christ offers.
5 And men are instructed sufficiently that they know good from evil. And the law is given unto men. And by the law no flesh is justified; or, by the law men are cut off. Yea, by the temporal law they were cut off; and also, by the spiritual law they perish from that which is good, and become miserable forever.
6 Wherefore, redemption cometh in and through the Holy Messiah; for he is full of grace and truth.
7 Behold, he offereth himself a sacrifice for sin, to answer the ends of the law, unto all those who have a broken heart and a contrite spirit; and unto none else can the ends of the law be answered.
8 Wherefore, how great the importance to make these things known unto the inhabitants of the earth, that they may know that there is no flesh that can dwell in the presence of God, save it be through the merits, and mercy, and grace of the Holy Messiah, who layeth down his life according to the flesh, and taketh it again by the power of the Spirit, that he may bring to pass the resurrection of the dead, being the first that should rise.
9 Wherefore, he is the firstfruits unto God, inasmuch as he shall make intercession for all the children of men; and they that believe in him shall be saved.
Wonderfully, part of the power of the Atonement and the grace of Christ is the gift of freedom to choose. We are given the power to choose God and Christ, or to reject them. That choice involves our response to the commandments God gives us and our willingness to repent or not (this is where humility and contriteness are essential). Read all of Lehi's discourse, but here are some of his concluding words:
27 Wherefore, men are free according to the flesh; and all things are given them which are expedient unto man. And they are free to choose liberty and eternal life, through the great Mediator of all men, or to choose captivity and death, according to the captivity and power of the devil; for he seeketh that all men might be hmiserable like unto himself.Believe in Christ and seek to make Him our Lord by repenting and living His teachings, growing steadily in Him and relying daily on the infinite grace that He offers.
28 And now, my sons, I would that ye should look to the great Mediator, and hearken unto his great commandments; and be faithful unto his words, and choose eternal life, according to the will of his Holy Spirit;
29 And not choose eternal death, according to the will of the flesh and the evil which is therein, which giveth the spirit of the devil power to captivate, to bring you down to hell, that he may reign over you in his own kingdom.