DESCARTES MEDITASYONLAR PDF

According to Descartes neither the senses nor reason can be trusted so long as it possible that we are mistaken about their deliverance. We are familiar with everyday errors in perception and this should suggest, in this extreme philosophical enterprise, that we reject the evidence of the senses entirely, since they are not infallible. Yet there is surely a difference between a local mistake, such as seeing a square tower as round in the distance, and a global mistake, which would be when everything we experience is mistaken. But since any veridical sensory experience could be reproduced as a dream, if there is no means of distinguishing dreaming from wakefulness, we cannot be sure whether experience faithfully reflects a world beyond the mind or not.

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Known as Cartesian dualism or Mind-Body Dualism , his theory on the separation between the mind and the body went on to influence subsequent Western philosophies. While many contemporary readers of Descartes found the distinction between mind and body difficult to grasp, he thought it was entirely straightforward. Descartes employed the concept of modes, which are the ways in which substances exist.

In Principles of Philosophy , Descartes explained, "we can clearly perceive a substance apart from the mode which we say differs from it, whereas we cannot, conversely, understand the mode apart from the substance".

To perceive a mode apart from its substance requires an intellectual abstraction, [85] which Descartes explained as follows: The intellectual abstraction consists in my turning my thought away from one part of the contents of this richer idea the better to apply it to the other part with greater attention.

Thus, when I consider a shape without thinking of the substance or the extension whose shape it is, I make a mental abstraction. Thus Descartes reasoned that God is distinct from humans, and the body and mind of a human are also distinct from one another.

But that the mind was utterly indivisible: because "when I consider the mind, or myself in so far as I am merely a thinking thing, I am unable to distinguish any part within myself; I understand myself to be something quite single and complete.

Everything that happened, be it the motion of the stars or the growth of a tree , was supposedly explainable by a certain purpose, goal or end that worked its way out within nature.

Aristotle called this the "final cause," and these final causes were indispensable for explaining the ways nature operated. Therefore, while Cartesian dualism paved the way for modern physics , it also held the door open for religious beliefs about the immortality of the soul. A human was according to Descartes a composite entity of mind and body. Descartes gave priority to the mind and argued that the mind could exist without the body, but the body could not exist without the mind.

In Meditations Descartes even argues that while the mind is a substance, the body is composed only of "accidents". If this were not so, I, who am nothing but a thinking thing, would not feel pain when the body was hurt, but would perceive the damage purely by the intellect, just as a sailor perceives by sight if anything in his ship is broken. It was this theory of innate knowledge that later led philosopher John Locke — to combat the theory of empiricism , which held that all knowledge is acquired through experience.

These animal spirits were believed to be light and roaming fluids circulating rapidly around the nervous system between the brain and the muscles, and served as a metaphor for feelings, like being in high or bad spirit. These animal spirits were believed to affect the human soul, or passions of the soul.

Descartes distinguished six basic passions: wonder, love, hatred, desire, joy and sadness. All of these passions, he argued, represented different combinations of the original spirit, and influenced the soul to will or want certain actions. He argued, for example, that fear is a passion that moves the soul to generate a response in the body. In line with his dualist teachings on the separation between the soul and the body, he hypothesized that some part of the brain served as a connector between the soul and the body and singled out the pineal gland as connector.

Thus different motions in the gland cause various animal spirits. But he also argued that the animal spirits that moved around the body could distort the commands from the pineal gland, thus humans had to learn how to control their passions. He argued that external motions such as touch and sound reach the endings of the nerves and affect the animal spirits.

Heat from fire affects a spot on the skin and sets in motion a chain of reactions, with the animal spirits reaching the brain through the central nervous system, and in turn animal spirits are sent back to the muscles to move the hand away from the fire. He challenged the views of his contemporaries that the soul was divine , thus religious authorities regarded his books as dangerous. Descartes believed that the brain resembled a working machine and unlike many of his contemporaries believed that mathematics and mechanics could explain the most complicated processes of the mind.

In the 20th century Alan Turing advanced computer science based on mathematical biology as inspired by Descartes. His theories on reflexes also served as the foundation for advanced physiological theories more than years after his death.

The physiologist Ivan Pavlov was a great admirer of Descartes. Like the rest of the sciences, ethics had its roots in metaphysics. However, as he was a convinced rationalist, Descartes clearly states that reason is sufficient in the search for the goods that we should seek, and virtue consists in the correct reasoning that should guide our actions.

Nevertheless, the quality of this reasoning depends on knowledge, because a well-informed mind will be more capable of making good choices , and it also depends on mental condition.

For this reason, he said that a complete moral philosophy should include the study of the body. He discussed this subject in the correspondence with Princess Elisabeth of Bohemia , and as a result wrote his work The Passions of the Soul, that contains a study of the psychosomatic processes and reactions in man, with an emphasis on emotions or passions. This is known as his "Provisional Morals". Because God is benevolent, Descartes can have some faith in the account of reality his senses provide him, for God has provided him with a working mind and sensory system and does not desire to deceive him.

From this supposition, however, Descartes finally establishes the possibility of acquiring knowledge about the world based on deduction and perception. Regarding epistemology , therefore, Descartes can be said to have contributed such ideas as a rigorous conception of foundationalism and the possibility that reason is the only reliable method of attaining knowledge. Descartes, nevertheless, was very much aware that experimentation was necessary to verify and validate theories.

One of these is founded upon the possibility of thinking the "idea of a being that is supremely perfect and infinite," and suggests that "of all the ideas that are in me, the idea that I have of God is the most true, the most clear and distinct. His attempt to ground theological beliefs on reason encountered intense opposition in his time. But Descartes could not avoid prodding God to set the world in motion with a snap of his lordly fingers; after that, he had no more use for God," while a powerful contemporary, Martin Schoock , accused him of atheist beliefs, though Descartes had provided an explicit critique of atheism in his Meditations.

The Catholic Church prohibited his books in Through this method of scepticism, he does not doubt for the sake of doubting but to achieve concrete and reliable information. In other words, certainty. He argues that sensory perceptions come to him involuntarily, and are not willed by him. They are external to his senses, and according to Descartes, this is evidence of the existence of something outside of his mind, and thus, an external world.

Descartes goes on to show that the things in the external world are material by arguing that God would not deceive him as to the ideas that are being transmitted, and that God has given him the "propensity" to believe that such ideas are caused by material things. Descartes also believes a substance is something that does not need any assistance to function or exist. But minds are substances, meaning they need only God for it to function.

The mind is a thinking substance. The means for a thinking substance stem from ideas. He avoided trying to demonstrate theological dogmas metaphysically. By the science of Morals, I understand the highest and most perfect which, presupposing an entire knowledge of the other sciences, is the last degree of wisdom. In his Discourse on the Method, he attempts to arrive at a fundamental set of principles that one can know as true without any doubt.

He relates this to architecture: the top soil is taken away to create a new building or structure. Descartes calls his doubt the soil and new knowledge the buildings. If animals showed signs of distress then this was to protect the body from damage, but the innate state needed for them to suffer was absent. The view that animals were quite separate from humanity and merely machines allowed for the maltreatment of animals , and was sanctioned in law and societal norms until the middle of the 19th century.

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Rene Descartes

Known as Cartesian dualism or Mind-Body Dualism , his theory on the separation between the mind and the body went on to influence subsequent Western philosophies. While many contemporary readers of Descartes found the distinction between mind and body difficult to grasp, he thought it was entirely straightforward. Descartes employed the concept of modes, which are the ways in which substances exist. In Principles of Philosophy , Descartes explained, "we can clearly perceive a substance apart from the mode which we say differs from it, whereas we cannot, conversely, understand the mode apart from the substance". To perceive a mode apart from its substance requires an intellectual abstraction, [85] which Descartes explained as follows: The intellectual abstraction consists in my turning my thought away from one part of the contents of this richer idea the better to apply it to the other part with greater attention.

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