Grotius's desire to bring about an union of sentiments led him, in 1613, while in England, to compose a small treatise, entitled, _A Reconciliation of the different Opinions on Predestination and Grace_.

This piece contains a display of the Arminian system, which he endeavours to place in the most favourable light[122].
The Edict which Grotius prepared by desire of the States[123], ordering the two parties to tolerate each other, having been warmly attacked by the Contra-Remonstrants, Grotius reprinted it, with a collection of passages justifying it against their censures.

He afterwards wrote a defence of that decree, in which he complains of the schismatical spirit of the Gomarists; proves that the States did all that depended on them to reconcile mens minds: maintains, against an anonymous writer, to whom he gives the name of _Lucifuga_, that it is false the Remonstrants gave the draught of that Edict; asserts, on the contrary, that several things are omitted in it, which they wished to be inserted, and which had even an appearance of reason and justice; and sets forth the moderation and equity of the Edict upon the whole.

Grotius did not finish this work; but on occasion of the dispute concerning the power of Sovereigns in things sacred; he composed a very considerable treatise.

He had already handled this subject in a tract on the Piety of the States of Holland: he examines it more thoroughly in this, proceeding on the same principles.