The faith whereby the Old Testament saints were justified varied greatly in its content. They had to believe whatever revelation God had made to them. Noah believed the Flood was coming, Abram believed that he was to have a seed, Rahab believed that Jericho would be taken.
The faith whereby a Son of God is justified has however always the same object; it is faith in the death of Jesus as an atonement for sin, and in the resurrection of Jesus as an evidence of God's acceptance of His sacrifice.
This faith is capable of great expansion as the Christian baby grows to maturity. It may begin as a very personal blessing; it will grow to be an event of universal significance. (Rom. 3:21-26, 4:23-5:11, 10:9.)
The central reason for Calvary was that the Law of God might be established in all its awful majesty. The whole success of the Creation depended upon the voluntary obedience of God's creatures to His Law, the Law of Love and Liberty. Anyone who broke the law of unselfishness, and wished to embark upon a life of self-pleasing, could at any time upset the whole loving plan. Therefore, because of the exceedingly dangerous nature of sin, i.e.. disobedience, God laid down the law that "the soul that sinneth it shall die," because it is too dangerous to be left at large. Indeed the whole happiness of Eternity will rest upon the unceasing obedience of all in it. (Gen. 2:17, Jer. 31:30, Ezekiel 18:4.)
The fearful nature of sin, therefore, and its awful consequences had to be burnt in upon every conscience. To do this and so ensure the prosperity of the Ages of the Ages God has taken two steps:
(b) He has satisfied the righteous demands of His Law that the death of a sinner is the inevitable result of his sin by sacrificing, not sinners, but their sinless Creator, to establish