The Church is commissioned to guard the truth, to hand it on faithfully from generation to generation, and to defend it against all forces of unbelief, I Tim 1:3-4; II Tim 1:13; Tit. 1:9-11. It must preach the Word unceasingly among all the nations of the world, Isa. 3:10-11; II Cor 5:20; I Tim 4:13; II Tim 2:15; 4:2; Tit 2:1-10, must draw up creeds and confessions, and must provide for the training of its future ministers, II Tim 2:2.

Berkhof’s Summary of Doctrine