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We turn now from the restorers of ancient doctrines and their opponents to the men who, continuing the opposition to the authority of Aristotle, point out new paths for the study of nature. The physician, Hieronymus Cardanus of Milan (1501-76), whose inclinations toward the fanciful were restrained, though not suppressed, by his mathematical training, may be considered the forerunner of the school. While the people should accept the dogmas of the Church with submissive faith, the thinker may and should subordinate all things to the truth. The wise man belongs to that rare class who neither deceive nor are deceived; others are either deceivers or deceived, or both. In his theory of nature, Cardanus advances two principles: one passive, matter (the three cold and moist elements), and an active, formative one, the world-soul, which, pervading the All and bringing it into unity, appears as warmth and light. The causes of motion are attraction and repulsion, which in higher beings become love and hate. Even superhuman spirits, the demons, are subject to the mechanical laws of nature.
The standard bearer of the Italian philosophy of nature was Bernardinus Telesius[1] of Cosenza (1508-88; De Rerum Natura juxta Propria Principia, 1565, enlarged 1586), the founder of a scientific society in Naples called the Telesian, or after the name of his birthplace, the Cosentian Academy. Telesius maintained that the Aristotelian doctrine must be replaced by an unprejudiced empiricism; that nature must be explained from itself, and by as few principles as possible. Beside inert matter, this requires only two active forces, on whose interaction all becoming and all life depend. These are warmth, which expands, and cold, which contracts; the former resides in the sun and thence proceeds, the latter is situated in the earth. Although Telesius acknowledges an immaterial, immortal soul, he puts the emphasis on sensuous experience, without which the understanding is incapable of attaining certain knowledge. He is a sensationalist both in the theory of knowledge and in ethics, holding the functions of judgment and thought deducible from the fundamental power of perception, and considering the virtues different manifestations of the instinct of self-preservation (which he ascribes to matter as well).
[Footnote 1: Cf. on Telesius, Florentine, 2 vols., Naples, 1872-74; K. Heiland, Erkenntnisslehre und Ethik des Telesius, Doctor's Dissertation at Leipsic, 1891. Further, Rixner and Siber, Leben und Lehrmeinungen berühmter Physiker am Ende des XVI. und am Anfang des XVII. Jahrhunderts, Sulzbach (1819-26), 7 Hefte, 2d ed., 1829. Hefte 2-6 discuss Cardanus, Telesius, Patritius, Bruno, and Campanella; the first is devoted to Paracelsus, and the seventh to the older Van Helmont (Joh. Bapt.).]
With the name of Telesius we usually associate that of Franciscus Patritius (1529-97), professor of the Platonic philosophy in Ferrara and Rome (Discussiones Peripateticae, 1581; Nova de Universis Philosophia, 1591), who, combining Neoplatonic and Telesian principles, holds that the incorporeal or spiritual light emanates from the divine original light, in which all reality is seminally contained; the heavenly or ethereal light from the incorporeal; and the earthly or corporeal, from the heavenly--while the original light divides into three persons, the One and All (Unomnia), unity or life, and spirit.
The Italian philosophy of nature culminates in Bruno and Campanella, of whom the former, although he is the earlier, appears the more advanced because of his freer attitude toward the Church. Giordano Bruno was born in 1548 at Nola, and educated at Naples; abandoning his membership in the Dominican Order, he lived, with various changes of residence, in France, England, and Germany. Returning to his native land, he was arrested in Venice and imprisoned for seven years at Rome, where, on February 17, 1600, he suffered death at the stake, refusing to recant. (The same fate overtook his fellow-countryman, Vanini, in 1619, at Toulouse.) Besides three didactic poems in Latin (Frankfort, 1591), the Italian dialogues, Della Causa, Principio ed Uno, Venice, 1584 (German translation by Lasson, 1872), are of chief importance. The Italian treatises have been edited by Wagner, Leipsic, 1829, and by De Lagarde, 2 vols., Göttingen, 1888; the Latin appeared at Naples, in 3 vols., 1880, 1886, and 1891. Of a passionate and imaginative nature, Bruno was not an essentially creative thinker, but borrowed the ideas which he proclaimed with burning enthusiasm and lofty eloquence, and through which he has exercised great influence on later philosophy, from Telesius and Nicolas, complaining the while that the priestly garb of the latter sometimes hindered the free movement of his thought. Beside these thinkers he has a high regard for Pythagoras, Plato, Lucretius, Raymundus Lullus, and Copernicus (died 1543).[1] He forms the transition link between Nicolas of Cusa and Leibnitz, as also the link between Cardanus and Spinoza. To Spinoza Bruno offered the naturalistic conception of God (God is the "first cause" immanent in the universe, to which self-manifestation or self-revelation is essential; He is natura naturans, the numberless worlds are natura naturata); Leibnitz he anticipated by his doctrine of the "monads," the individual, imperishable elements of the existent, in which matter and form, incorrectly divorced by Aristotle as though two antithetical principles, constitute one unity. The characteristic traits of the philosophy of Bruno are the lack of differentiation between pantheistic and individualistic elements, the mediaeval animation and endlessness of the world, and, finally, the religious relation to the universe or the extravagant deification of nature (nature and the world are entirely synonymous, the All, the world-soul, and God nearly so, while even matter is called a divine being).[2]
[Footnote 1: Nicolaus Copernicus (Koppernik; 1473-1543) was born at Thorn; studied astronomy, law, and medicine at Cracow, Bologna, and Padua; and died a Canon of Frauenberg. His treatise, De Revolutionibus Orbium Caelestium, which was dedicated to Pope Paul III., appeared at Nuremberg in 1543, with a preface added to it by the preacher, Andreas Osiander, which calls the heliocentric system merely an hypothesis advanced as a basis for astronomical calculations. Copernicus reached his theory rather by speculation than by observation; its first suggestion came from the Pythagorean doctrine of the motion of the earth. On Copernicus cf. Leop. Prowe, vol. i. Copernicus Leben, vol. ii. (Urkunden), Berlin, 1883-84; and K. Lohmeyer in Sybel's Historische Zeitschrift, vol. lvii., 1887.]
[Footnote 2: Cf. on Bruno, H. Brunnhofer (somewhat too enthusiastic), Leipsic, 1882; also Sigwart, Kleine Schriften, vol. i. p. 49 seq.]
Bruno completes the Copernican picture of the world by doing away with the motionless circle of fixed stars with which Copernicus, and even Kepler, had thought our solar system surrounded, and by opening up the view into the immeasurability of the world. With this the Aristotelian antithesis of the terrestrial and the celestial is destroyed. The infinite space (filled with the aether) is traversed by numberless bodies, no one of which constitutes the center of the world. The fixed stars are suns, and, like our own, surrounded by planets. The stars are formed of the same materials as the earth, and are moved by their own souls or forms, each a living being, each also the residence of infinitely numerous living beings of various degrees of perfection, in whose ranks man by no means takes the first place. All organisms are composed of minute elements, called minima or monads; each monad is a mirror of the All; each at once corporeal and soul-like, matter and form, each eternal; their combinations alone being in constant change. The universe is boundless in time, as in space; development never ceases, for the fullness of forms which slumber in the womb of matter is inexhaustible. The Absolute is the primal unity, exalted above all antitheses, from which all created being is unfolded and in which it remains included. All is one, all is out of God and in God. In the living unity of the universe, also, the two sides, the spiritual (world-soul), and the corporeal (universal matter), are distinguishable, but not separate. The world-reason pervades in its omnipresence the greatest and the smallest, but in varying degrees. It weaves all into one great system, so that if we consider the whole, the conflicts and contradictions which rule in particulars disappear, resolved into the most perfect harmony. Whoever thus regards the world, becomes filled with reverence for the Infinite and bends his will to the divine law--from true science proceed true religion and true morality, those of the spiritual hero, of the heroic sage.
Thomas Campanella[1] (1568-1639) was no less dependent on Nicolas and Telesius than Bruno. A Calabrian by birth like Telesius, whose writings filled him with aversion to Aristotle, a Dominican like Bruno, he was deprived of his freedom on an unfounded suspicion of conspiracy against the Spanish rule, spent twenty-seven years in prison, and died in Paris after a short period of quiet. Renewing an old idea, Campanella directed attention from the written volume of Scripture to the living book of nature as being also a divine revelation. Theology rests on faith (in theology, Campanella, in accordance with the traditions of his order, follows Thomas Aquinas); philosophy is based on perception, which in its instrumental part comprises mathematics and logic, and in its real part, the doctrine of nature and of morals, while metaphysics treats of the highest presuppositions and the ultimate grounds,--the "pro-principles," Campanella starts, as Augustine before him and Descartes in later times, from the indisputable certitude of the spirit's own existence, from which he rises to the certitude of God's existence. On this first certain truth of my own existence there follow three others: my nature consists in the three functions of power, knowledge, and volition; I am finite and limited, might, wisdom, and love are in man constantly intermingled with their opposites, weakness, foolishness, and hate; my power, knowledge, and volition do not extend beyond the present. The being of God follows from the idea of God in us, which can have been derived from no other than an infinite source. It would be impossible for so small a part of the universe as man to produce from himself the idea of a being incomparably greater than the whole universe. I attain a knowledge of God's nature from my own by thinking away from the latter, in which, as in everything finite, being and non-being are intermingled, every limitation and negation, by raising to infinity my positive fundamental powers, posse, cognoscere, and velle, or potentia, sapientia, and amor, and by transferring them to him, who is pure affirmation, ens entirely without non-ens. Thus I reach as the three pro-principles or primalities of the existent or the Godhead, omnipotence, omniscience, and infinite love. But the infrahuman world may also be judged after the analogy of our fundamental faculties. The universe and all its parts possess souls; there is naught without sensation; consciousness, it is true, is lacking in the lower creatures, but they do not lack life, feeling, and desire, for it is impossible for the animate to come from the inanimate. Everything loves and hates, desires and avoids. Plants are motionless animals, and their roots, mouths. Corporeal motion springs from an obscure, unconscious impulse of self-preservation; the heavenly bodies circle about the sun as the center of sympathy; space itself seeks a content (horror vacui).
[Footnote 1: Campanella's works have been edited by Al. d'Ancona, Turin, 1854, Cf. Sigwart, Kleine Schriften, vol. i. p. 125 seq.]
The more imperfect a thing is, the more weakened is the divine being in it by non-being and contingency. The entrance of the naught into the divine reality takes place by degrees. First God projects from himself the ideal or archetypal world (mundus archetypus), i.e., the totality of the possible. From this ideal world proceeds the metaphysical world of eternal intelligences (mundus mentalis), including the angels, the world-soul, and human spirits. The third product is the mathematical world of space (mundus sempiternus), the object of geometry; the fourth, the temporal or corporeal world; the fifth, and last, the empirical world (mundus situalis), in which everything appears at a definite point in space and time. All things not only love themselves and seek the conservation of their own being, but strive back toward the original source of their being, to God; i.e., they possess religion. In man, natural and animal religion are completed by rational religion, the limitations of which render a revelation necessary. A religion can be considered divine only when it is adapted to all, when it gains acceptance through miracles and virtue, and when it contradicts neither natural ethics nor the reason. Religion is union with God through knowledge, purity of will, and love. It is inborn, a law of nature, not, as Machiavelli teaches, a political invention.
Campanella desired to see the unity in the divine government of the world embodied in a pyramid of states with the papacy at the apex: above the individual states was to come the province, then the kingdom, the empire, the (Spanish) world-monarchy, and, finally, the universal dominion of the Pope. The Church should be superior to the State, the vicegerent of God to temporal rulers and to councils.