Benedict de Spinoza's writings laid the groundwork for the 18th century Enlightenment and for modern Biblical criticism. By virtue of his magnum opus, the Ethics, Spinoza is considered one of Western philosophy's definitive ethicists. Men would never be superstitious, if they could govern all their circumstances by set rules, or if they were always favoured by fortune: but being frequently driven into straits where rules are useless, and being often kept fluctuating pitiably between hope and fear by the uncertainty of fortune's greedily coveted favours, they are consequently, for the most part, very prone to credulity. The human mind is readily swayed this way or that in times of doubt, especially when hope and fear are struggling for the mastery, though usually it is boastful, over-confident, and vain. After experience had taught me that all the usual surroundings of social life are vain and futile; seeing that none of the objects of my fears contained in themselves anything either good or bad, except in so far as the mind is affected by them, I finally resolved to inquire whether there might be some real good having power to communicate itself, which would affect the mind singly, to the exclusion of all else: whether, in fact, there might be anything of which the discovery and attainment would enable me to enjoy continuous, supreme, and unending happiness. Spinoza was one of the great rationalists of 17th century philosophy. He helped lay the groundwork for the 18th century Enlightenment and modern biblical criticism. His correspondence helps shed light on his ethical opinions and positions. Required reading for those who wish a deeper understanding of the writings of Benedict de Spinoza.

An early voice calling for reason as the ruler of the human mind, and a man with, at best, a Deistic outlook on religion, Spinoza is perhaps the first truly modern philosopher. He is certainly the first modern critic of the Bible. His devoted adherents include many great names of 19th-century literature: Goethe, Coleridge, Shelley, and George Eliot were deeply swayed by his writing; in the 20th century, Albert Einstein claimed Spinoza's deterministic outlook as an abiding influence; understanding the writings of all these figures is greatly enhanced by an appreciation of Spinoza. In Theologico-Political Treatise, first published anonymously in 1670, Spinoza rails against religious intolerance and calls for governments to be entirely secular. His Political Treatise, unfinished at his death, was published only posthumously, and deals with democratic government. Dutch philosopher BENEDICT DE SPINOZA (1632-1677), alternately and paradoxically known as "the best Jew" and "the best atheist," is best known for his Ethics.

Two important works by one of philosophy's most original and penetrating thinkers appear in this volume. Spinoza's "Theologico-Political Treatise" presents an eloquent plea for religious liberty, demonstrating that true religion consists of the practice of simple piety, independent of philosophical speculation. He examines the Bible at length to show that freedom of thought and of speech are consistent with the religious life. In the unfinished "Political Treatise," the author develops a theory of government founded on common consent.