Bruno imagined the universe as infinite space, filled with ether, in which an infinite number of worlds, or solar systems resembling our own, composed of similar materials and inhabited by countless living creatures, move with freedom. The whole of this infinite and complex cosmos he conceived to be animated by a single principle of thought and life. This indwelling force, or God, he described in Platonic phraseology sometimes as the Anima Mundi, sometimes as the Artificer, who by working from within molds infinite substance into an infinity of finite modes. Though we are compelled to think of the world under the two categories of spirit and matter, these apparently contradictory constituents are forever reconciled and harmonized in the divine existence, whereof illimitable activity, illimitable volition, and illimitable potentiality are correlated and reciprocally necessary terms. In Aristotelian language, Bruno assumed infinite form and infinite matter as movements of an eternal process, by which the infinite unity manifests itself in concrete reality. This being the case, it follows that nothing exists which has not life, and is not part of God. The universe itself is one immeasurable animal, or animated Being. The solar systems are huge animals; the globes are lesser animals; and so forth down to the monad of molecular cohesion. As the universe is infinite and eternal, motion, place and time do not qualify it; these are terms applicable only to the finite parts of which it is composed. For the same reason nothing in the universe can perish. What we call birth and death, generation and dissolution, is only the passage of the infinite, and homogeneous entity through successive phases of finite and differentiated existence; this continuous process of exchange and transformation being stimulated and sustained by attraction and repulsion, pro perties of the indwelling divine soul aiming at self-realization.
Having formed this conception, Bruno supported it by metaphysical demonstration, and deduced conclusions bearing on psychology, religion, ethics. Much of his polemic was directed against the deeply-rooted notion of a finite world derived from Aristotle. Much was devoted to the proof of the Copernican discovery. Orthodox theology was indirectly combated or plausibly caressed. There are consequently many pages in his dialogues which do not interest a modern reader, seeing that we have outlived the conditions of thought that rendered them important. In the process of his argument, he established the theory of a philosophical belief, a religion of religions, or 'religione della mente,' as he phrased it, prior to and comprehensive of all historical creeds. He speculated, as probabilities, the transmigration of souls, and the interchangeability of types in living creatures. He further postulated a concordance between the order of thought and the order of existence in the universe, and inclined to the doctrine of necessity in morals. Bruno thus obtained per saltum a prospect over the whole domain of knowledge subsequently traversed by rationalism in metaphysics, theology and ethics. In the course of these demonstrations and deductions he anticipated Descartes' position of the identity of mind and being. He supplied Spinoza with the substance of his reasoned pantheism; Leibnitz with his theory of monadism and pre-established harmony. He laid down Hegel's doctrine of contraries, and perceived that thought was a dialectic process. The modern theory of evolution was enunciated by him in pretty plain terms. He had grasped the physical law of the conservation of energy. He solved the problem of evil by defining it to be a relative condition of imperfect development. He denied that Paradise or a Golden Age is possible for man, or that, if possible, it can be considered higher in the moral scale than organic struggle toward completion by reconciliation of opposites through pain and labor. He sketched in outline the comparative study of religions, which is now beginning to be recognized as the proper basis for theology. Finally, he had a firm and vital hold upon that supreme speculation of the universe, considered no longer as the battle-ground of dual principles, or as the finite fabric of an almighty designer, but as the self-effectuation of an infinite unity, appearing to our intelligence as spirit and matter—that speculation which in one shape or another controls the course of modern thought.[125]
It must not be supposed that Bruno apprehended these points with distinctness, or that he expressed them precisely in the forms with which we are familiar. The hackneyed metaphor of a Pisgah view across the promised land applies to him with singular propriety. Moreover, as an acute critic has remarked, things old and new are so curiously blended in his writings that what at first sight appears modern, is often found upon reflection to be antique, and what is couched in obsolete scholastic terminology, turns out upon analysis to contain the germs of advanced theories.[126] The peculiar forms adapted for the exposition of his thoughts contribute to the difficulty of obtaining a methodical view of Bruno's philosophy. It has, therefore, been disputed whether he was a pantheist or an atheist, a materialist or a spiritualist, a mystic or an agnostic. No one would have contended more earnestly than Bruno himself, that the sage can hold each and all of these apparent contradictions together, with the exception of atheism; which last is a simple impossibility. The fragmentary and impassioned exposition which Bruno gave to his opinions in a series of Italian dialogues and Latin poems will not discourage those of his admirers who estimate the conspicuous failure made by all elaborate system-builders from Aristotle to Hegel. To fathom the mystery of the world, and to express that mystery in terms of logic, is clearly beyond the faculty of man. Phil osophies that aim at universe-embracing, God-explaining, nature-elucidating, man-illuminating, comprehensiveness, have justly, therefore, become objects of suspicion. The utmost that man can do, placed as he is at obvious disadvantages for obtaining a complete survey of the whole, is to whet his intelligence upon confessedly insoluble problems, to extend the sphere of his practical experience, to improve his dominion over matter, to study the elevation of his moral nature, and to encourage himself for positive achievements by the indulgence in those glorious dreams from which regenerative creeds and inspiring philosophies have sprung—
Still climbing after knowledge infinite,
And ever moving as the restless spheres.
Faith and poetry are the highest regions in which his spirit can profitably move. The study of government, law, and social ethics, the analysis of physical conditions to which he is subject, and over which he has an undefined, though limited, control, form the practical sphere of his intelligence. Bruno traversed these regions; and, forasmuch as the outcome of his exploration was no system, but a congeries of poetic visions, shrewd guesses, profound intuitions, and passionate enthusiasms, bound together and sustained by a burning sense of the Divine unity in nature and in man, we may be permitted to regard him as more fortunate than those cloud-castle-builders whose classifications of absolute existences are successively proved by the advance of relative know ledge to be but catalogues of some few objects apprehended by the vision of each partially-instructed age. We have, indeed, reason to marvel how many of Bruno's intuitions have formed the stuff of later, more elaborated systems, and still remain the best which these contain. We have reason to wonder how many of his divinations have worked themselves into the common fund of modern beliefs, and have become philosophical truisms.
It is probable that if Bruno's career had not been cut short by the dungeon and the stake at the early age of thirty-four, he might have produced some final work in which his theories would have assumed a formal shape. It is possible that the Vatican even now contains the first sketch for such a studied exposition in the treatise on the Seven Arts, which Giovanni Mocenigo handed over to the Inquisition, and which the philosopher intended to dedicate to Clement VIII. But the loss of this elaborated system is hardly to be regretted, except for the clearer light it must have thrown upon the workings of the most illuminated intellect in the sixteenth century. We know that it could not have revealed to us the secret of things.
Bruno cast his thoughts in two molds: the dialogue, and Latin hexameters. He was attracted to the latter by his early study of Parmenides and Lucretius. The former seems to have been natural to the man. We must not forget that he was a Neapolitan, accustomed from childhood to the farces of his native land, vividly alive to the comic aspects of existence, and joyously appreciative of reality. His first known composition was a comedy, Il Candelajo; and something of the drama can be traced in all those Italian compositions which distinguish the period of his activity as an author in London. Lucian rather than Plato or Cicero determined the form of his dialogue. An element of the burlesque distinguishes his method of approaching religious and moral problems in the Spaccio della Bestia, and the Cavallo Pegaseo. And though he exchanged the manner of his model for more serious exposition in the trio of metaphysical dialogues, named La Cena delle Ceneri, Della Causa, and Dell' Infinito Universo, yet the irresistible tendency to dramatic satire emerges even there in the description of England and in the characters of the indispensable pedant buffoon. His dialogue on the Eroici Furori is sustained at a high pitch of aspiring fervor. Mystical in its attempt to adumbrate the soul's thirst for truth and beauty, it adopts the method of a running commentary upon poems, in the manner of a discursive and fantastic Vita Nuova. In his Italian style, Bruno owed much to the fashion set by Aretino. The study of Aretino's comedies is apparent in Il Candelajo. The stringing together of words and ideas in triplets, balanced by a second set of words and ideas in antithetical triplets—this trick of rhetoric, which wearies a modern reader of his prose, seems to have been copied straight from Aretino. The coinage of fantastic titles, of which Lo Spaccio della Bestia Trionfante contributed in some appreciable degree to Bruno's martyrdom, should be ascribed to the same influence. The source of these literary affectations was a bad one. Aretino, Doni, and such folk were no fit masters for Giordano Bruno even in so slight a matter as artistic form. Yet, in this respect, he shared a corrupt taste which was common to his generation, and proved how fully he represented the age in which he lived. It is not improbable that the few contemporary readers of his works, especially in euphuistic England, admired the gewgaws he so plentifully scattered and rendered so brilliant by the coruscations of his wit. When, however, the real divine oestrum descends upon him, he discards those follies. Then his language, like his thought, is all his own: sublime, impassioned, burning, turbid; instinct with a deep volcanic fire of genuine enthusiasm. The thought is simple; the diction direct; the attitude of mind and the turn of expression are singularly living, surprisingly modern. We hear the man speak, as he spoke at Fulke Greville's supper-party, as he spoke at Oxford, as he spoke before the Sorbonne, as he might be speaking now. There is no air of literary effort, no tincture of antiquated style, in these masculine utterances.