Saved Through the Gospel

Ques. 19. Whence knowest thou this?  Ans. From the holy gospel, which God himself first revealed in Paradise; and afterwards published by the patriarchs and prophets, and represented by the sacrifices and other ceremonies of the law; and lastly has fulfilled it by his only begotten Son.  Heidelberg Catechism, Lord's Day 4 Ques. 19. Whence knowest thou this?  Ans. From the holy gospel, which God himself first revealed in Paradise; and afterwards published by the patriarchs and prophets, and...