Regarding Spinoza, whom M. Arnauld has called the most impious and most dangerous man of this century, he was truly an Atheist, [i.e.,] he allowed absolutely no Providence dispensing rewards and punishments according to justice. ...The God he puts on parade is not like ours; he has no intellect or will. ...He fell well short of mastering the art of demonstration; he had only a mediocre knowledge of analysis and geometry; what he knew best was to make lenses for microscopes.