John Calvin inherited the doctrines of the medieval Roman Church. In particular, he inherited that Church's view of the law of God, given to Israel through Moses on Sinai. Calvin took the Church's teaching on this, as it had been developed by Thomas Aquinas, and tweaked it to produce a Reformed threefold-use of the law in the new covenant. Some Anabaptists and others resisted him at the time, but they were heavily out-gunned, and Calvin's system has dominated the Reformed and evangelical world ever since. Millions, who have never read a word of Calvin, many of whom would shudder at the very mention of his name, nevertheless, are, on the law, Calvinists - even though they may not know it. David Gay contends that Calvin was wrong on the law, and this has had serious consequences. Gay is concerned, in particular, with the Reformer's third use of the law - which is, said Calvin, to sanctify the believer. Gay disagrees. In his book, 'Christ is All', he probed Calvin's system, exposed it to the light of Scripture, and showed where it departed from the New Testament. He also demonstrated the utter inadequacy of the escape routes used by the Reformed to get round awkward passages of Scripture. Turning from the negative, Gay then looked at every major New Testament passage dealing with the believer and the law. Next, he set out scriptural teaching on the true way of sanctification for the believer. This, he showed, is not by the law of Moses; rather, it is by the law of Christ in the hands of the Holy Spirit. Indeed, as Gay made clear, the law of Christ is, ultimately, Christ himself. Hence his chosen title: 'Christ is All'. Having set out the believer's rule, he then answered seven objections levelled against it. This present volume, the fourth in the 'Brachus Sanctification Series', is Gay's chapter on Jeremiah's prophecy of the new covenant (Jer. 31:31-34), drawn from his 'Christ is All: No Sanctification by the Law', edited to enable it to stand on its own. Too often it is blithely assumed that the law which is written on the believer's heart is the ten commandments. Simply to assume it is quite wrong. Moreover, the assumption itself is wrong. As Gay shows, the law written on the believer's heart by the Holy Spirit is the law of Christ - not the law of Moses Yet again, another devastating blow to Calvin's threefold use of the law In publishing this short work, Gay is making a key part of his argument on the law more widely accessible, and, at the same time, hoping to contribute to a right understanding of this vital prophecy.