"O that I were an angel, and could have the wish of mine heart, that I might go forth and speak with the trump of God, with a voice to shake the earth, and cry repentance unto every people! Yea, I would declare unto every soul, as with the voice of thunder, repentance and the plan of redemption, that they should repent and come unto our God, that there might not be more sorrow upon all the face of the earth. But behold, I am a man, and do sin in my wish; for I ought to be content with the things which the Lord hath allotted unto me." (Alma 29:1-3)
In his wish, he setup an image of what he is not, instead of the perfect I am.