"For someone who is not a Mormon, what matters most about Joseph Smith is how American both the man and his religion have proved to be. So self-created was he that he transcends Emerson and Whitman in my imaginative response, and takes his place with the great figures of our fiction, since at moments he appears far larger than life, in the mode of a Shakespearean character. So rich and varied a personality, so vital a spark of divinity, is almost beyond the limits of the human, as normally we construe those limits. To one who does not believe in him, but who has studied him intensely, Smith becomes almost a mythology in himself."
January 1, 1970
https://en.wikiquote.org/wiki/Joseph_Smith%2C_Jr.