The work unto which the servant of Christ is called is many-sided. Not only is he to preach the Gospel to the unsaved, to feed God's people with knowledge and understanding (Jer 3:15), and to take up the stumbling stone out of their way (Isa. 57:14), but he is also charged to "cry aloud, spare not, lift up thy voice like a trumpet, and show My people their transgression" (Isa 58:1 and cf. 1 Tim 4:2). While another important part of his commission is stated in, "Comfort ye, My people, said your God" (Isa 40:1).