Your question is the most difficult in the world. It is not a question I can answer simply with yes or no. I am not an Atheist. I do not know if I ca… - Benedictus de Spinoza

I assert, that the doctrine of the immateriality, simplicity, and indivisibility of a thinking substance is a true atheism, and will serve to justify all those sentiments, for which Spinoza is so universally infamous. From this topic, I hope at least to reap one advantage, that my adversaries will not have any pretext to render the present doctrine odious by their declamations, when they see that they can be so easily retorted on them.

The work of the popularizer, though sometimes depreciated by professional students, is a very useful and necessary work, and in few cases more useful or more necessary than in the case of Spinoza. For, although Spinoza is often so difficult that even the best philosophers cannot be sure of having understood him, the essence of his doctrine is capable of being interesting and profitable to many who cannot devote themselves to metaphysics. Although the task of interpretation has been admirably performed for the technical reader by Mr. Joachim, and for a wider class by Sir Frederick Pollock, there must be many who will be grateful for the chance of reading the Ethics itself, without having to work their way through Spinoza's Latin.

Spinoza remained throughout his life, and well into the eighteenth century, a thinker whom one could admire only in secret, hiding one's sympathy just as his Marrano antecedents had concealed their wayward Jewishness. Open admiration could destroy even the most established of reputations, well into the eighteenth century's so-called Age of Reason. In the 1780s, for example, Friedrich Heinrich Jacobi launched a generalized attack on Enlightenment thought by claiming that the late poet Lessing had been a closet Spinozist, a charge sufficient to compromise the entire movement for which Lessing had been a leading spokesman. Jacobi even went after Immanuel Kant and his successors, arguing that "consistent philosophy is Spinozist, hence pantheist, fatalist, and atheist."