For if you keep my commandments you shall receive of his fulness, and be glorified in me as I am in the Father; therefore, I say unto you, you shall receive grace for grace" (D&C 93:19–20). And then a few verses later the Lord says: And truth is knowledge of things as they are, and as they were, and as they are to come; And whatsoever is more or less than this is the spirit of that wicked one who was a liar from the beginning. 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; And no man receiveth...