I. Substance, perceptible by the senses, which is finite and perishable. This substance is either the abstract substance, or the substance connected with form (
åú
v
äïò
).
II. The higher substance, which, though perceived by the senses, is imperishable, such as are the heavenly bodies. Here the active principle (
ἐíÝñãåéá
) steps in, which, in so far as it contains that which is to be produced, is understanding (
íïῦò
). That which it contains is the purpose (
ôὸ ïὑ ἕíåêá
), which purpose is realized in the act. Here we have the two extremes of potentiality and agency, matter and thought. The often- mentioned entelechic is the relation between these two extremes. It is the point of transition between
äýíáìéò
and
ἐíÝñãåéá
, and is accordingly the cause of motion, or efficient cause, and represents the soul.
III. The third form of substance is that in which the three forms of power, efficient cause and effect, are united the absolute substance, eternal unmoved, God himself” (Lewes, Hist. of Philosophy, 2, 126). As to the relative place of the idea of God in the systems of Plato and of Aristotle, Maurice well remarks that “it cannot be denied that the recognition of an absolute being, of an absolute good, was that which gave life to the whole doctrine of Plato, and without which it is unmeaning; that, on the contrary, it is merely the crowning result, or, at least, the necessary postulate of Aristotle's philosophy. In strict consistency with this difference, it was a being to satisfy the wants of man which Plato sighed for; it was a first cause of things to which Aristotle did homage. The first would part with no indication or symbol of the truth that God has held intercourse with men, has made himself known to them; the second was content with seeking in nature and logic for demonstrations of his attributes and his unity. When we use personal language to describe the God of whom Plato speaks, we feel that we are using that which suits best with his feelings and his principles even when, through reverence or ignorance, he forbears to use it himself. When we use personal language to describe the deity of Aristotle, we feel that it is improper and unsuitable, even if, through deference to ordinary notions, or the difficulty of inventing any other, he resorts to it himself” (Maurice, Moral and Metaph. Philosophy, ch. 6, div. 3, § 5).
Practical philosophy, according to Aristotle, includes ethics, the laws of the individual moral life; oeconomics, those of the family; and politics, those of man in the state. His “inquiry starts from the conception of a sovereign good and final end. The final end (
ôÝëïò
) is happiness (
åὐäáéìïíßá
,
åὐðñáîßá
), which is the result of the energies of the soul (
ἐí âßῳ ôåëåßῳ
) in a perfect life (Eth. Nic. 1, 1-7; 10:5, 6); to it appertains true dignity, as being the highest thing. This perfect exercise of reason is virtue, and virtue is the perfection of speculative and practical reason; hence the: subdivision of intellectual virtue (
äéáíïçôéêὴ ἀñåôή
) and moral (
ἠèéêή
, Eth. Nic. 1, 13; 2:1). The first belongs, in its entire plenitude, to God alone, and confers the hibhest felicity, or absolute beatitude; the second, which he also styles the human, is the constant perfecting of the reasonable will (
ἕîéò
, habitus), the effect of a deliberate resolve, and consequently of liberty (
ðñïáéñåôéêή
), of which Aristotle was the first to display its psychological character, and of which the subjective form consists in always taking the mean between two extremes (
ôὸ ìÝóïí
,
ìåóüôçò
). Aristotle may be said to have been the first to analyze
ðñïáßñåóéò
, or deliberate free choice (Eth. Nic. 2, 6).
Ethical virtue presents itself under six principal characters, having reference to the different objects of desire and avoidance (the cardinal virtues), namely, courage (
ἀíäñßá
), temperance (
óùöñïóýíç
), generosity (
ἐëåõèåñéüôçò
), delicacy (
ìåãáëïðñÝðåéá
), magnanimity and a proper love of glory (Eth. Nic. 5, 1, 6 sq.), (
ìåãáëïøõ÷ßá
), gentleness and moderation. To these are added the accessory virtues, such as politeness of manners (
åὐôñáðåëßá
), amiability, the faculty of loving and being beloved (
öéëßá
), and, lastly, justice (
äßêáéïóýíç
), which comprises and completes all the others, and on that account is called perfect virtue (
ôåëåßá
). Under the head of justice Aristotle comprehends right also. Justice he regards as the special virtue (applied to the notion of equality,
ôὸ ἵóïí
) of giving every man his due; and its operation may be explained by applying to it the arithmetical and geometrical proportions conformably to the two species, the distributive and corrective, into which he subdivided the virtue. To these must be added equity, which has for its end the rectification of the defects of law. Under the head of right (
äßêáéïí
) he distinguishes that appertaining to a family (
ïἰêïíïìéêüí
) from that of a city (
ðïëéôéêüí
), dividing the latter into the natural (
öõóéêüí
) and the positive (
íïìéêüí
). A perfect unity of plan prevails throughout his ethics, his politics, and his economics. Both the latter have for their end to show how the object of man's existence defined in the ethics, viz. virtue combined with happiness, may be attained in the civil and domestic relations through a good constitution of the state and household.
The state (
ðïëßò
) is a complete association of a certain number of smaller societies sufficient to satisfy in common all the wants of life (Pol. 1, 2). Mental power alone should preponderate. The science of politics is the investigation of means tending to the final end proposed by the state. Its principle is expediency, and its perfection the suitableness of means to the end. By this principle Aristotle would prove the lawfulness of slavery. (W. T. Krug, De Aristotele Servitutis Defensore (Lips. 1813, 4to); C. G. Gottling, Commentatio di Notione Servitutis apud Aristotelem (Jen. 1821, 4to); Wallon, Hist. de Esclavuge d ans P Antiquite (Paris, 1847, 3 vols. 8vo); Tenneman in, Manual Hist. Phil. (§ 147, 148). Professor Shedd (History of Doctrines, bk. 1, ch. 1) adopt, perhaps too closely, Ritter's reconciliation of Plato and Aristotle, going so far as to say that “Platonism and Aristotelianism differ only in form, not in substance.” While we cannot agree to this broad statement, there is yet, as to the points named, reason for what he says, viz. that, in reference to the principal questions of philosophy, “both are found upon the same side of the line that divides all philosophies into the material, the spiritual, the pantheistic, and the theistic. There is a substantial agreement between Plato and his pupil Aristotle respecting the rationality and immortality of the mind as mind in distinction from matter, respecting the nature and origin of ideas, respecting the relative position and importance of the senses, and of knowledge by the senses. But these are subjects which immediately reveal the general spirit of a philosophic system. Let any one read the ethical treatises of Plato and Aristotle, and he will see that both held the same general idea of the Deity as a moral governor, of moral law, and of the immutable reality of right and wrong.” But the fundamental difference of the two systems still remains, viz. that Plato regards the “ideas” or eternal archetypes of things as forming the true substance of the latter, and as having their existence in themselves, independent of the material things, their soulless shadows; while Aristotle was of opinion that the individual thing contained the true substance, which forms whatever is permanent in the flux of outward appearances.
For a long time the Aristotelian philosophy remained in Greece a rival of the Platonic, but at last the latter gained the ascendency. In Rome Aristotle found but few adherents. The fathers of the ancient Church were, on the whole, not favorable to Aristotelianism, but it was cultivated with great zeal by several sects, especially those which were inclined toward a kind of rationalism. (Comp. Lecky, History of Rationalism 1, 417.) Thus the Artemonites were reproached with occupying themselves more with the study of Aristotle than with that of the Scriptures. The Anomceans of the school of Eunomius were called by the fathers “young Aristotelians” (see, on the opinions of the Greek fathers respecting this point, Launoy, De varia Aristotelis in Acad. Par. fortuna, in his Opera omnia, 4:175 sq. Colossians 1732; Kuhn, Katholische Dogmatikc, 2, 369). Nevertheless, the influence of Aristotle commenced to spread in Christian philosophy during the 4th and 5th centuries, especially in the West. Previously the Neo- Platonic philosophy, which tried to reconcile Aristotle with Plato, had given a new impulse to the study of Aristotle, and called forth a number of commentaries, of which that of Porphyry is the most celebrated. Among the Christian Aristotelians of those times was Nemesius, bishop of Emesa, A.D. 400, whose work on “the Nature of the Soul” is based on the Aristotelian anthropology, and remained long in use and influence in Christian philosophy. Eneus of Gaza, toward the end of the 5th century, and Zacharius Scholasticus (first half of 6th century), opposed Aristotle, especially with regard to the world, and approached nearer the doctrine of Plato. Of greater significance was Johannes Philoponus, who called himself
“Grammaticus,” and is supposed by modern writers to have lived in the first half of the 6th century. He combated the Platonic philosophy, and followed Aristotle so closely as even to deviate from the commonly received doctrines of Christianity. Thus, applying the Aristotelian doctrine that individual things are substances, he changed the doctrine of the Trinity into a kind of Tritheism. John Damascenus, the chief theologian of the Greek Church, knew and used the dialectics of Aristotle, but made no attempt to thoroughly blend it with the doctrines of Christianity. A new era in the history of the Aristotelian philosophy within the Christian Church begins after the Christianization of the Germanic tribes, for the treatment of which SEE SCHOLASTICISM.
A very full account of Aristotle's writings and of his system (from the Hegelian point of view), by Prof. Stahr, is given in Smith, Dict. of Gr. and Roman Biog. etc., vol. 1. For an excellent sketch of the Life of Aristotle, by Prof. Park, see Bibliotheca Sacra, vol. 1. The literature of the subject is copiously given in Stahr's article above referred to. See also Maurice, Moral and Metoph. Philosophy, ch. 6, div. 3; Haureau, Philosophie Scholastique, vol. 1; Gioberti, Introd. a Il'etude de la Philosophie, 1, 98; Kitter, History of Philosophy, vol. 3; North Brit. Rev. Nov. 1858; Ama. Bibl. Repos. July, 1842; Meth. Quart. Rev. July, 1853, p. 342 sq.; Biese, Philos. des Aristoteles (Berlin, 1835, 2 vols. 8vo); St. Hilaire, Logique d'Aristote (Par. 1838, 2 vols. 8vo); Ravaisson, La Metaphysique d'Aristote (Paris,. 1840, 2 vols. 8vo); Vacherot, Thorie des prem. principes selon Aristote (Par. 1836, 8vo); Simon, Du Dieu d'Aristote (Par. 1840, 8vo).; Wetzer u. Welte, Kirchen-Lexikon, 1:412. For references as to the influence of Aristotle on Christian theology, SEE SCHOLASTICISM.