"We believe that a man must be called of God, by prophecy, and by the laying on of hands by those who are in authority, to preach the Gospel and administer in the ordinances thereof." Article of Faith 5
"Let every man abide in the same calling wherein he was called." 1 Corinthians 7:20
"Heavenly Father has given authority to men to do His work on earth. This authority is called the priesthood. Boys aged 12 and older can hold various offices within the lesser or Aaronic Priesthood. Men who are 18 and older can receive various offices within the Melchizidec Priesthood. Priesthood holders can bless and pass the sacrament, collect fast offerings, baptize, give priesthood blessings, and administer the gift of the Holy Ghost. All priesthood leaders are interviewed by Church leaders to assure their worthiness to use Heavenly Father's sacred power...Members of the church can be called to serve in their ward or branch. When a bishop needs to fill a position within his ward, he ponders and prays about who should be called. When he receives confirmation from Heavenly Father that the person is the right one for the calling, that person is called, voted on by the members, then blessed and set apart by those with priesthood authority to do the work in the calling." Paraphrased from Friend, May 2011.
Many times in my life I have been called to teach or to lead. These callings have taken many forms. In Primary(children's Sunday School) I've been secretary, taught children aged 3, 4 ,5, 6, and 9, and led Wolfs, Bears, and Webelos. In Young Women's I've helped girls moving into womanhood through the personal progress program, organized and run girls camps, taught 12 year olds, and served as counselor (meaning plan, oversee, and/or teach all Sunday meetings and activities). In Relief Society, I've been a Sunday teacher, visiting teacher, music conductor, sewing specialist, secretary, Visiting Teaching coordinator, planner for many dinners and events, and counselor (meaning plan, oversee, and/or teach all Sunday meetings and activities plus become aware of the needs of the families in the ward and find ways to have those needs met). Finally, I served a mission. I don't list these things to boast. On the contrary, I see I've done so little and want to more in whatever capacity my Father in Heaven desires me to serve. Some say we LDS-Christians work to hard for our church. I say I don't work for the church, but to help build God's Kingdom on earth and to help bring others unto Christ. It's a work worth doing, because it brings me many blessings, blesses the lives of others, and serves my Lord, Jesus Christ.
"And the King shall answer and say unto them, Verily I say unto you, Inasmuch as ye have done it unto one of the least of these my brethren, ye have done it unto me." Matthew 25:40