To do the work of the Lord on the earth. God’s chosen servants must be called of God in order to minister in His work. When true ministers do the Lord’s will, they represent the Lord in their official duties and act as His agents (D&C 64:29), thus conducting the work necessary for the salvation of mankind. The Lord has given apostles, prophets, evangelists, high priests, seventies, elders, bishops, priests, teachers, deacons, helps, and governments for the perfecting of the Saints, for the work of the ministry (1 Cor. 12:12–28; Eph. 4:11–16; D&C 20; 107).