The Reformed were strangely scandalized at this work. Samuel Desmarets answered it with great bitterness, which drew another piece from Grotius in defence of the former, with this title: _Appendix ad interpretationem locorum Novi Testamenti, quae de Antichristo agunt, aut agere putantur, in qua via sternitur ad Christianorum concordiam_. Desmarets is never mentioned in it but under the name of Borboritus. It has been observed, that Grotius was guilty of a slight inaccuracy in this treatise: he says the Emperor Barbarossa's enemies ascribed to him the pretended book _De tribus Impostoribus_: he confounds the grandson with the grandfather, for it was Frederic II. against whom this calumny was advanced, as appears from the letters of Peter Desvignes, his Secretary and Chancellor, and as Grotius himself remarks in his observations on Campanella's philosophy. He printed at the same time his treatise _Of Faith and Works_ against Desmarets, and against the error of the inadmissibility of grace, under the title of _Explicatio trium illustrissimorum locorum Novi Testamenti, Capitis I. Pauli ad Ephesios posterioris, Capitis II. Jacobi Commatis XIV. & sequentium, Capitis III. Epistolae I. Johannis, in quibus agitur de fide & operibus_. This work shews, that faith is not sufficient for Justification; and that if those who have faith live in sin, they are hated by God. _Via ad pacem ecclesiasticam_ was printed in 1642: it contains the _Consultation_ of Cassander presented to the Emperors Ferdinand I. and Maximilian II. accompanied with remarks by Grotius. He expected that these works, which were compiled solely with a view to promote union among Christians, would procure him many enemies; and he adopted, on this occasion, what was said in 1557 by an author who laboured in the same design, That for persons to endeavour to make mankind live in peace, was commendable; that they might indeed expect a recompence from the blessed Peace-maker, but they had great reason to apprehend the same fate with those, who, attempting to part two combatants, receive blows from both. "Perhaps, by writing to reconcile such as entertain very opposite sentiments, I shall offend both parties: but if it should so happen, I shall comfort myself with the example of him who said, If I please men I am not the servant of Christ." Grotius, content with gratifying his pacific desires, expected his reward from posterity; which he clearly intimates in some verses written by him on this subject Accipe sed placidis, quae si non optima, certe, Expressit nobis non mala pacis amor. Et tibi dic, nostro labor hic si displicet aevo, A grata pretium posteritate feret. Rivetus, the Clergyman, treated Grotius with as much indignity, as if he had attempted to destroy the foundations or Christianity. Grotius answered him in a tract, entitled: _Animadversiones in animadversiones Andreae Riveti_.