death, they were cordially welcome to. In death as in life they would find him faithful to his ideal.

Spinoza has often been likened to the old Hebrew prophets. He does not, it is true, exhort the people to follow in the path of righteousness; it is the philosopher's task simply to show the way. But the morality Spinoza stands for is the old prophetic morality purified and made consistent with itself. And Spinoza was, in his own time, as the prophets were in theirs, a heretic and a rebel, a voice calling in the wilderness—a wilderness that was later to become the very citadel of civilization. Excommunicated by the Jews and vilified by the Gentiles during his lifetime, Spinoza has, since his death, been canonized by both alike as the most saintly and exalted of philosophers. Like his forerunners of old, Spinoza was a prophet in Israel, for Mankind.

INTRODUCTION TO THE PHILOSOPHY OF
SPINOZA

I

Spinoza's philosophy has suffered not a little from the highly abstruse and technical form in which the Ethics is written. Some, who are not inured to the hardships of philosophy, quite naturally jump to the conclusion that its formidable geometry contains only the most inscrutable of philosophic mysteries; and a wise humility persuades them to forego the unexampled enlightenment a mastery of the difficulties would yield. Others, who are devoutly wedded to what they consider the unreservedly empirical character of modern (that is, true) philosophy, avoid the Ethics because they are convinced, on general principles, that only a mind hopelessly lost in the dark night of medieval speculation could conceive of philosophy in such ultra-deductive fashion. Reason was for so long servile to idle theology, it is not at all surprising that a work exemplifying reason to such high degree as does the Ethics, should receive scant respect from intrepid empiricists. It is so easy to confuse the rationalizations of reason with the nature of reason itself.

Spinoza did not, however, choose the geometrical order because he thought his philosophy too profound for ordinary exposition; nor did he choose it because he was enmeshed in medieval philosophic speculation. He chose it because his fundamental philosophic aim was to establish ethics on a thoroughly tested, scientific foundation; and geometry, an exemplar of all mathematical science, most completely embodied, at that time, the highest scientific ideal. Man, Spinoza held, is a part of Nature, and Nature is governed by eternal and immutable laws. It must be just as possible, therefore, to apply the mathematical method to man, as it is to apply it to matter. It must be possible to determine, with the certitude obtainable in the exact sciences, what things are good for man and what means he has for attaining them.

Spinoza's belief in the self-sufficing, lawful order of Nature, and the adequacy of the natural powers of our mind to understand the mysteries (popularly so appraised) of heaven and earth, the singular expository style of the Ethics emphasizes in unmistakable fashion. Even for our understanding of God's own nature, Divine Revelation, as commonly interpreted in Spinoza's day and our own, is wholly unnecessary. We need only the revelation afforded by the natural powers of reason operative in us. In geometry, we do not blindly accept conclusions on faith, nor do we reject them by authority. We are guided in our discovery of the true and the false, solely by the light of our natural understanding. And the truths we discover are not temporary fabrications of the human mind, but eternal truths about the nature of things. Perhaps no other single aspect of Spinoza's philosophy distinguishes Spinoza from the medievalists as thoroughly as does his use of the geometrical order of exposition; and no other single aspect, perhaps, justifies as thoroughly Spinoza's claim to rank with the moderns if not even the contemporaries.

The geometer's method of starting with definitions and axioms and proceeding from proposition to proposition especially appealed to Spinoza, apart from the fact that geometry was an ideal science, because, for Spinoza, the essence of logical method consists in starting out with ideas that are of utter simplicity. Then, if the ideas are understood at all, they can only be clearly and distinctly understood. The absolutely simple we can either know or not know. We cannot be confused about it. And ideas which are clearly and distinctly understood are, according to Spinoza, necessarily true. Such unambiguously simple and therefore necessarily true ideas Spinoza believed his definitions and axioms expressed. Furthermore, if we gradually build up the body of our science by means of our initial simple ideas, justifying ourselves at every step by adequate proof, our final result will necessarily be as firmly established and as certainly true as the elementary ideas we started with. The reliability of this whole procedure more than compensates for its tediousness—a defect Spinoza expressly recognizes.

Unfortunately, however, there are other defects in the geometrical method when it is applied to philosophy, far more serious than its tediousness,—defects, moreover, Spinoza apparently did not recognize. Even though the geometrical method is preëminently scientific, it is hardly a form suitable for philosophy. The Euclidean geometer can take it for granted that the reader understands what a line or plane, a solid or an angle is. For formality, a curt definition is sufficient. But the philosopher's fundamental terms and ideas are precisely those in need of most careful and elaborate elucidation—something which cannot be given in a formal definition or axiom. Also, in the geometrical form, the burden of the author's attention is shifted from the clarification of the propositions to the accurate demonstration of them. Which, in a philosophical treatise, is most unfortunate. For though it is undoubtedly highly desirable that the philosopher should observe the same care and precision as the scientist, admitting nothing he cannot prove, it is nevertheless just as well for the philosopher to take reasonable care that what he is conscientiously proving is understood. That Spinoza did not always take such care but considerably over-estimated the self-evidence of his definitions and axioms and the simplicity of many of his important propositions, is an unhappy fact conclusively established by the increasing volume of Spinozistic literature.

II

However, in spite of the difficult, and to the literary repellent form of the Ethics, the catholicity of Spinoza's influence has been extremely remarkable. In time, his influence bids fair to equal in range, if not in gross extent, the as yet unparalleled influence of the artist-philosopher Plato. It took about a hundred years for Spinoza to come into something of his own. For the Ethics was condemned with the Tractatus Theologico-Politicus as an atheistic and immoral work. Only when the romantic philosophers of Germany, following the lead of Lessing and Jacobi, found in Spinoza a man who was, as they thought, after their own heart, did Spinoza's mundane fortune change. As a result of their efforts, Spinoza ceased to be a philosopher to be execrated in public (though furtively read in private), and became a philosopher to be eulogized on all occasions in most rhapsodic, if bewildering, terms. Many others too, besides professional philosophers, began to read Spinoza with much sympathy and unbounded admiration. Goethe, Matthew Arnold, Heine, George Eliot, Flaubert, Coleridge, and Shelley—to mention only a few distinguished lay names—found in