Joseph Smith, Seeker After Truth, Prophet of God, pg. 28; “That night after retiring, he sought the Lord in earnest prayer to forgive his follies, and to give him further light. While he was thus praying, the room became filled with light until it was “lighter than noon day.”…A glorious personage appeared at his bedside, who declared himself to be a heavenly messenger, Moroni by name, an ancient American resurrected prophet, sent by God, he said, to prepare Joseph further for the work he was to do.” – John A. Widtsoe
Colossians 2:6-8; “As ye have therefore received Christ Jesus the Lord, so walk ye in him: 7 Rooted and built up in him, and stablished in the faith, as ye have been taught, abounding therein with thanksgiving. 8 Beware lest any man spoil you through philosophy and vain deceit, after the tradition of men, after the rudiments of the world, and not after Christ.”
According to the Book of Mormon, Moroni is an angel of light. See 2 Cor. 11:14.