In the Law of God a truly perfect standard of righteousness is given to us which, with good reason, can be called the eternal will of the Lord, for there, fully and clearly contained in two Tables, is all that He requires of us.
In the first Table, He has laid down for us, in just a few commandments, what is the service of His majesty which pleases Him. In the second Table, He tells us what are the duties of charity which are due to our neighbor.
Let us listen to the Law, then, and we shall see afterwards what doctrine we ought to draw from it and, similarly, what fruit we ought to gather from it.
John Calvin, Truth For All Time