D&C 45

Supporting the doctrine of justification and sanctification the Lord taught that -

"...unto as many as received me gave I power to do many miracles, and to become the sons of God; and even unto them that believed on my name gave I power to obtain eternal life."  (Doctrine and Covenants 45:8)

It is by His power or power of the atonement that we are justified or become.  Because of His divine power, He adds -

"Listen to him who is the advocate with the Father, who is pleading your cause before him—
4 Saying: Father, behold the sufferings and death of him who did no sin, in whom thou wast well pleased; behold the blood of thy Son which was shed, the blood of him whom thou gavest that thyself might be glorified;
5 Wherefore, Father, spare these my brethren that believe on my name, that they may come unto me and have everlasting life."  (Doctrine and Covenants 45:3–5)