The Spirit of God enables a person to have the strength to overcome every weakness that besets them. “...the Lord giveth no commandments unto the children of men, save he shall prepare a way for them that they may accomplish the thing which he commandeth them.” (1 Nephi 3:7) “...Yea, come unto Christ, and be perfected in him, and deny yourselves of all ungodliness...” (Moroni 10:32)
Now this is the commandment: Repent, all ye ends of the earth, and come unto me and be baptized in my name, that ye may be sanctified by the reception of the Holy Ghost, that ye may stand spotless before me at the last day. (3 Nephi 27:20)