Mormon knew that Moroni faced overwhelming challenges due the wickedness of the Nephites. Nevertheless, Mormon also knew that Moroni could endure with the assistance of divine grace. True to the Faith explains that grace provides strength to persevere in the daily struggles of life:
“The word grace, as used in the scriptures, refers primarily to the divine help and strength we receive through the Atonement of the Lord Jesus Christ. …
“In addition to needing grace for your ultimate salvation, you need this enabling power every day of your life. As you draw near to your Heavenly Father in diligence, humility, and meekness, He will uplift and strengthen you through His grace” (True to the Faith: A Gospel Reference [2004], 77–78).