III
The central controlling idea of Spinoza's philosophy is that all things are necessarily determined in Nature, which he conceives to be an absolutely infinite unified and uniform order. Instead of maintaining that God is like man magnified to infinity, who has absolute, irresponsible control of a universe which is external to him—the rather rude anthropomorphic account of the ultimate nature of the universe contained in the Bible—Spinoza maintains that God is identical with the universe and must be and act according to eternal and necessary laws. God is Nature, if we understand by Nature not merely infinite matter and infinite thought,—the two attributes of Nature specifically known to us—but infinite other attributes the precise character of which we can never, because of our finitude, comprehend. Within this Being—God, Nature or Substance (the more technical, philosophic term)—there is no dichotomy; and there is outside of it no regulative or coercive intelligence such as the Biblical God is conceived to be. Whatever is, is one. And it is, in the special Spinozistic sense, supremely perfect because absolutely real. There is, considered in its totality, no lack or defect in Nature. There can be, therefore, no cosmic purposes, for such purposes would imply that Nature is yet unfinished, or unperfected, that is, not completely real. Something that cannot possibly be true of an absolutely infinite Being.
Spinoza's conception of an absolutely infinite universe is a vast improvement upon the pent-in, finite medieval universe inherited from Aristotle. It exceeds by infinity, in breadth of vision, even our contemporary notion of an infinite physical cosmos. And his conception of universal necessity is as great an advance upon the view that transformed natural occurrences into miraculous events. Miracles, according to the Bible, most clearly exemplify God's omnipotence; for omnipotence in the popular mind consists in nothing so much as in the ability to satisfy any purpose or whim no matter how transitory it is, or how incompatible with what has been antecedently desired or done. Miracles may be extraordinary occurrences with reference to the order of Nature, but they are, with reference to God, commonplace exhibitions of His Almighty power. For Spinoza, however, miracles, did they actually occur, would exhibit not God's power, but His impotence. The omnipotence of the one absolutely infinite Being is not shown by temperamental interruptions of the course of events; it is manifested in the immutable and necessary laws by which all things come to pass.
Spinoza's conception of the universe, flawlessly operating under necessary laws, effectively disposes of miracles. And to dispose of miracles is one of Spinoza's primary concerns. For as long as miracles happen, organized knowledge and rational control—the bases of a rational life—are both impossible for man.
If events were not absolutely conditioned by the determinate nature of things, instead of science, we should have superstition, and magic instead of scientific control. When a god governs the universe according to his transitory and altogether personal whims, or when chance, without a god, reigns, man is hopelessly at the mercy of the flux of events. In the conduct of his affairs memory is of no use to him, and forethought is impossible. In such cases man, as we read in his history, and could easily conclude from his nature, piteously grasps for salvation at whatever happens his way. All things are then loaded with ominous powers the strength of which is directly proportionate to the hope or fear that enthralls him. If the universe were lawless, the irony of man's fate would forever be what it was when he lived in abysmal ignorance: when in bitterest need of sane guidance, he would be most prone to trust to the feeblest and most irrational of aids. On the other hand, if things are determined by necessity, nothing happening either miraculously or by chance, science and a commensurate power of scientific control is possible for man. No more important argument could Spinoza conceive in favor of his doctrine.