Exodus 24:12

12.And the Lord said unto Moses, Come up to me. Moses himself is now taken up higher; because it was sufficient that the elders should be admitted to that intermediate vision, from whence they might certainly know that he would not proceed further, except by God’s command, in order that he might be received to familiar colloquy. Although, however, Joshua began to go on with him, it is plain that he was only his companion for six days, until Moses left him behind, and was gathered into the cloud. When God declares that He will give him “a law and commandment,” this must not be understood of any new instruction, but of the authentic writing (consignatione) of the Law: for, after having spoken of the two tables, He immediately mentions, in apposition, the Law and Commandment, by way of explanation; as if He had said that He would give the tables, which were to be a divine monument (320) of His covenant; so that a summary of doctrine should exist among the people, not written with ink, and by the hand of man, but by the secret power of the Spirit. I am afraid the speculation of Augustine is more subtle than correct, that the Law was written by the finger of God, (321) because only the Spirit of God engraves it on our hearts; for, to pass over the fact that the hardness of the stones was not changed, what will their breaking mean, which will be spoken of hereafter? Surely it does not accord that, whereas the grace of regeneration endures unto the end, the Law should be only engraven efficaciously by the Spirit upon men’s hearts for a moment. What I have advanced, however, is beyond controversy, that the Law was inscribed upon these polished stones, that the perpetuity of the covenant might be testified in all ages.