Many people feel discouraged because they constantly fall short. They know firsthand that “the spirit indeed is willing, but the flesh is weak.”32 They raise their voices with Nephi in proclaiming, “My soul grieveth because of mine iniquities.”33
I am certain Nephi knew that the Savior’s grace allows and enables us to overcome sin.34 This is why Nephi labored so diligently to persuade his children and brethren “to believe in Christ, and to be reconciled to God.”35
After all, that is what we can do! And that is our task in mortality! – Dieter F. Uchtdorf, “The Gift of Grace,” Ensign (CR) May 2015