A true knowledge of the covenants is indispensable to a correct presentation of the gospel

Sufficient should have already been said to impress us with the weightiness of our present theme, and the great importance of arriving at a right understanding of the divine covenants. A true knowledge of the covenants is indispensable to a correct presentation of the gospel, for he who is ignorant of the fundamental difference which obtains between the covenant of works and the covenant of grace is utterly incompetent for evangelism. But by whom among us are the different covenants clearly understood? Refer unto them to the average preacher, and you at once perceive you are speaking to him in an unknown tongue. Few today discern what the covenants are in themselves, their relations to each other, and their consequent bearings upon the design of God in the Redeemer. Since the covenants pertain unto the very “rudiments of the doctrine of Christ,” ignorance of them must cause obscurity to rest upon the whole gospel system.

Arthur W. Pink- The Divine Covenants-Introduction