“Thus the heavens and the earth were finished, and all the host of them. And on the seventh day God ended His work which He had made; and He rested on the seventh day from all His work which He had made. And God blessed the seventh day, and sanctified it: because that in it He had rested from all His work which God created and made” (Gen. 2:1-3).
E. J. Waggoner
In the fifteenth chapter of Romans and the fourth verse the Spirit of God, through the Apostle Paul, sets the seal of approval upon the whole of the Old Testament, in giving the object for which it was written. He says, "For whatsoever things were written before were written for our learning, that we through patience and comfort of the Scriptures might have hope."
The preaching of Christ and Him crucified is the preaching of the power of God, and therefore it is the preaching of the Gospel, for the Gospel is the power of God. ... The conclusion therefore is that the Gospel is the revelation of Jesus Christ in men.
Now the Sabbath was given as the sign of a perfect creation completed; therefore it is the sign of those perfect works restored by the cross of Christ.
As disbelief of the story of creation hides the beginnings of this world, so disbelief of the story of the flood hides the view of the end, for the days of Noah are referred to by the Saviour as a parallel to the days of the coming of the Son of man.
So we are fully assured that the Gospel is the making known of Christ in men. Or rather, the Gospel is Christ in men, and the preaching of it is the making known to men of the possibility of Christ’s dwelling in them.