The Lord did not come with the armies of heaven, in power and great glory, nor send His messengers panoplied with aught else than the truth of heaven, to communicate to the meek the lowly, the youth of humble origin, the sincere enquirer after the knowledge of God. But He did send His angel to this same obscure person, Joseph Smith Jun., who afterwards became a Prophet, Seer, and Revelator, and informed him that he should not join any of the religious sects of the day, for they were all wrong; that they were following the precepts of men instead of the Lord Jesus; that He had a work for him to perform, inasmuch as he should prove faithful before Him.

Journal of Discourses 2:170-171 (February 18, 1855) - First Vision

Journal of Discourses/Volume 2/The Constitution and Government of the United States, etc.