Message 66:2

Behold, I am the servant of the Lord, the blessed one sent of God. I come from his presence and my name is John. I am the same that was and is called the Baptist. I am the Elias. I bring the Elijah Message many have looked for. I bring words of the Lord. I bring a warning.

We know that the messages that we today are brought by the same messenger that the Lord promised us that he would send. We know this because he told us so. John explains several times in the messages that he is the one that God has sent and what his mission is. The words that he brings agree with the ones that we already have in the Bible and The Record of the Nephits.