Both Joseph Smith and Moses were chosen by God to lead His people as prophets. Both had hard lives and each as a leader felt that the people were as a weight they struggled to pull along. Both men brough forth the word of God in abundance and only sought to do God’s will and not their own. Here is a great quote from Brigham Young on the calling of Joseph as a prophet.
“Who else ever said that Joseph Smith was anything but an unlearned son of a backwoodsman; who had all his lifetime, ever since he would handle an ax, helped his father to support his little family by cutting wood? Thus the Lord found him, and called him to be a Prophet, and made him a successful instrument in laying the foundation of His kingdom for the last time. This people never professed that Joseph Smith was anything more than a Prophet given to them of the Lord; and to whom the Lord gave the keys of this last dispensation, which were not to be taken from him in time, neither will they be in eternity.” Brigham Young (Journal of Discourses, 26 vols. [London: Latter-day Saints’ Book Depot, 1854-1886], 2: 127.)