Neonomianism in Christian theology is the doctrine that the Gospel is a new law, the requirements of which humanity fulfills by faith and repentance, often including a distinction between initial and final justification, the latter being merited through good deeds.
[1][2][3] The theology of Richard Baxter has caused much controversy among Reformed theologians, because his teachings have been seen as opposing justification by faith alone.
[4][5] Richard Baxter defended this view when he wrote, In our first Believing we take Christ in the Relations of a Saviour, and Teacher, and Lord, to save us from all sin, and to lead us to glory.
Our first faith is our Contract with Christ….And all Contracts of such nature, do impose a necessity of performing what we consent to and promise, in order to the benefits….Covenant-making may admit you, but it's the Covenant-keeping that must continue you in your privileges.William Styles defined Neonomianism as a doctrine associated with the theologian Daniel Williams, "which held that God has receded from the demands of the Moral Law, and given up its original obligations—and that the Gospel is a New Law, but of milder requirements, in which Faith, Repentance, and sincere though imperfect Obedience, are substituted in the room of the perfect and perpetual Obedience required by the original Law."
(William Styles, A Manual of Faith and Practice) Isaac Chauncy (1632–1712) was one of the leading opponents of neonomianism.