In 1685 he published "Sentimens de quelques theologiens de Hollande sur l'histoire critique du Vieux Testament composée par le P. Richard Simon", in which, while pointing out what he believed to be Richard Simon's faults, he advanced views of his own. These included: arguments against the Mosaic authorship of the Pentateuch; his views as to the manner in which the five books were composed; and his opinions on the subject of divine inspiration in general, in particular on the Book of Job, Book of Proverbs, Ecclesiastes, and Canticles. Simon's "Réponse" (1686) drew from Le Clerc a "Defence des sentimens" in the same year, which was followed by a new "Réponse" (1687).