Cartesianism
Cartesianism
The philosophy of the French thinker, Rene Descartes (Cartesius) 1596-1650. After completing his formal education at the Jesuit College at La Fleche, he spent the years 1612-1621 in travel and military service. The reminder of his life was devoted to study and writing. He died in Sweden, where he had gone in 1649 to tutor Queen Christina. His principal works are
Discours de la methode, (preface to his Geometric, Meteores, Dieptrique) Meditationes de prima philosophia,
Principia philosophiae,
Passions de l’ame,
Regulae ad directionem ingenii,
Le monde.
Descartes is justly regarded as one of the founders of modern epistemology. Dissatisfied with the lack of agreement among philosophers, he decided that philosophy needed a new method, that of mathematics. He began by resolving to doubt everything which could not pass the test of his criterion of truth, viz. the clearness and distinctness of ideas. Anything which could pass this test was to be readmitted as self-evident. From self-evident truths, he deduced other truths which logically follow from them. Three kinds of ideas were distinguished
innate, by which he seems to mean little more than the mental power to think things or thoughts;
adventitious, which come to him from without;
factitious, produced within his own mind.
He found most difficulty with the second type of ideas. The first reality discovered through his method is the thinking self. Though he might doubt nearly all else, Descartes could not reasonably doubt that he, who was thinking, existed as a res cogitans. This is the intuition enunciated in the famous aphorismI think, therefore I am, Cogito ergo sum. This is not offered by Descartes as a compressed syllogism, but as an immediate intuition of his own thinking mind. Another reality, whose existence was obvious to Descartes, was God, the Supreme Being. Though he offered several proofs of the Divine Existence, he was convinced that he knew this also by an innate idea, and so, clearly and distinctly. But he did not find any clear ideas of an extra-mental, bodily world. He suspected its existence, but logical demonstration was needed to establish this truth. His adventitious ideas carry the vague suggestion that they are caused by bodies in an external world. By arguing that God would be a deceiver, in allowing him to think that bodies exist if they do not, he eventually convinced himself of the reality of bodies, his own and others. There are, then, three kinds of substance according to Descartes
Created spirits, i.e. the finite soul-substance of each manthese are immaterial agencies capable of performing spiritual operations, loosely united with bodies, but not extended since thought is their very essence.
Uncreated Spirit, i.e. God, confined neither to space nor time, All-Good and All-Powerful, though his Existence can be known clearly, his Nature cannot be known adequately by men on earth, He is the God of Christianity, Creator, Providence and Final Cause of the universe.
Bodies, i.e. created, physical substances existing independently of human thought and having as their chief attribute, extension. Cartesian physics regards bodies as the result of the introduction of “vortices”, i.e. whorls of motion, into extension. Divisibility, figurability and mobility, are the notes of extension, which appears to be little more thin what Descartes’ Scholastic teachers called geometrical space.
God is the First Cause of all motion in the physical universe, which is conceived as a mechanical system operated by its Maker. Even the bodies of animals are automata. Sensation is the critical problem in Cartesian psychology; it is viewed by Descartes as a function of the soul, but he was never able to find a satisfactory explanation of the apparent fact that the soul is moved by the body when sensation occurs. The theory of animal spirits provided Descartes with a sort of bridge between mind and matter, since these spirits are supposed to be very subtle matter, halfway, as it were, between thought and extension in their nature. However, this theory of sensation is the weakest link in the Cartesian explanation of cognition. Intellectual error is accounted for by Descartes in his theory of assent, which makes judgment an act of free will. Where the will over-reaches the intellect, judgment may be false. That the will is absolutely free in man, capable even of choosing what is presented by the intellect as the less desirable of two alternatives, is probably a vestige of Scotism retained from his college course in Scholasticism. Common-sense and moderation are the keynotes of Descartes’ famous rules for the regulation of his own conduct during his nine years of methodic doubt, and this ethical attitude continued throughout his life. He believed that man is responsible ultimately to God for the courses of action that he may choose. He admitted that conflicts may occur between human passions and human reason. A virtuous life is made possible by the knowledge of what is right and the consequent control of the lower tendencies of human nature. Six primary passions are described by Descartes wonder, love, hatred, desire, joy and sorrow. These are passive states of consciousness, partly caused by the body, acting through the animal spirits, and partly caused by the soul. Under rational control, they enable the soul to will what is good for the body. Descartes’ terminology suggests that there are psychological faculties, but he insists that these powers are not really distinct from the soul itself, which is man’s sole psychic agency. Descartes was a practical Catholic all his life and he tried to develop proofs of the existence of God, an explanation of the Eucharist, of the nature of religious faith, and of the operation of Divine Providence, using his philosophy as the basis for a new theology. This attempted theology has not found favor with Catholic theologians in general.
Apart from philosophy, Descartes’ contribution to the development of analytical geometry, the theory of music and the science of optics, are noteworthy achievements.
Descartes is one of the fathers of modern philosophy; his general influence is too extensive to be detailed. Leibniz, Spinoza, Malebranche, Clauberg, De La Forge, Geulincx, Placentius, Chouet, Legrand, Corneio — these and many others spread Cartesianism throughout Europe. (See Boutroux, “Descartes and Cartesianism,” Camb. Mod. Hist., IV, ch. 27.) At present, German Phenomenology, French Spiritualism and Positivism, Bergsonism, and certain forms of Catholic thought represented by J. Geyser in Germany and M. Blondel in France, are offshoots of Cartesianism.
Oeuvres completes, ed. C. Adam et P. Tannery, 13 vols. (Paris, 1896-1911). The Philos. Works of Descartes, transl. by Haldane and Ross, 2 vols. (Cambridge, 1911-12). Fischer, K., Descartes and his School (London, 1887). Gilson, E., Le role de la pensee medievale dans la formation du systeme cartesien (Paris, 1930). Maritain, J., Le songe de Descartes (Paris, 1932). Gemelli, A. (ed.), Cartesio (symposium) (Milan, 1937). — V.J.B.