Alma 38:9 Behold, he is the life and the light of the world. Behold, he is the word of truth and righteousness.
Either 4:12 And whatsoever thing persuadeth men to do good is of me; for good cometh of none save it be of me. I am the same that leadeth men to all good; he that will not believe my words will not believe me -- that I am; and he that will not believe me will not believe the Father who sent me. For behold, I am the Father, I am the light,band the life, and the truth of the world.
D&C 84:45 For the word of the Lord is truth, and whatsoever is truth is light, and whatsoever is light is Spirit, even the Spirit of Jesus Christ.
DC 93:26 The Spirit of truth is of God. I am the Spirit of truth, and John bore record of me, saying: He received a fulness of truth, yea, even of all truth;
John 1:17 For the law was given by Moses, but grace and truth came by Jesus Christ.