Sunday 13 March 2011

Philosophers

Socrates (ca 470–399B.C.E.)
Socrates firmly believed that, before humans can understand the world, they first need to understand themselves; the only way to accomplish that is with rational thought. To understand what this means, one must first appreciate the Greek understanding of the world. Man is composed of two parts, a body and a soul. The soul itself has two principal parts, an Irrational part, which is the emotions and desires, and a Rational part, which is our true self. In our everyday experience, the irrational soul is drawn down into the physical body by its desires and merged with it, so that our perception of the world is limited to that delivered by the physical senses. The rational soul is beyond our conscious knowledge, but sometimes communicates via images, dreams, and other means.

The task of the philosopher is to refine and eventually extract the irrational soul from its bondage, hence the need for moral development, and then to connect with the rational soul, and so become a complete person, manifesting the higher spiritual essence of the person whilst in the physical. True rationalism is therefore not simply an intellectual process, but a shift in perception and a shift in the qualitative nature of the person. The rational soul perceives the world in a spiritual manner - it sees the Platonic Forms - the essence of what things are. To know the world in this way requires that one first know oneself as a soul, hence the requirement to 'know thyself', i.e. to know who you truly are.

Socrates did not publish or write any of his thoughts, but he was constantly in discussion with others. He would usually start by asking a rhetorical (seemingly answerable) question, to which the other would give an answer. Socrates would then continue to ask questions until all conflicts were resolved, or until the other could do nothing else but admit to not knowing the answer (which was what most of his discussions ended with). Socrates did not claim to know the answers, but that did not take away the ability to critically and rationally approach problems. His goal was to show that, ultimately, our intellectual approach to the world is flawed, and we must transcend this to obtain true knowledge of what things are.

René Descartes (1596–1650)

Descartes thought that only knowledge of eternal truths – including the truths of mathematics, and the epistemological and metaphysical foundations of the sciences – could be attained by reason alone; other knowledge, the knowledge of physics, required experience of the world, aided by the scientific method. He also argued that although dreams appear as real as sense experience, these dreams cannot provide persons with knowledge. Also, since conscious sense experience can be the cause of illusions, then sense experience itself can be doubtable. As a result, Descartes deduced that a rational pursuit of truth should doubt every belief about reality. He elaborated these beliefs in such works as Discourse on Method, Meditations on First Philosophy, and Principles of Philosophy. Descartes developed a method to attain truths according to which nothing that cannot be recognised by the intellect (or reason) can be classified as knowledge. These truths are gained "without any sensory experience", according to Descartes. Truths that are attained by reason are broken down into elements that intuition can grasp, which, through a purely deductive process, will result in clear truths about reality.

Descartes therefore argued, as a result of his method, that reason alone determined knowledge, and that this could be done independently of the senses. For instance, his famous dictum, cogito ergo sum, is a conclusion reached a priori and not through an inference from experience[citation needed]. This was, for Descartes, an irrefutable principle upon which to ground all forms of other knowledge. Descartes posited a metaphysical dualism, distinguishing between the substances of the human body ("res extensa") and the mind or soul ("res cogitans") . This crucial distinction would be left unresolved and lead to what is known as the mind-body problem, since the two substances in the Cartesian system are independent of each other and irreducible.

Baruch Spinoza (1632–1677)

The philosophy of Baruch Spinoza is a systematic, logical, rational philosophy developed by him in the seventeenth century in Europe. It's a system of ideas built from basic building blocks with an internal consistency with which Spinoza tried to answer life's major questions and in which he proposed that "God exists only philosophically." He was heavily influenced by thinkers such as Descartes and Euclid and Thomas Hobbes as well as theologians in the Jewish philosophical tradition such as Maimonides, but his work was in many respects a departure from the Judeo-Christian tradition. Many of Spinoza's ideas continue to vex thinkers today and many of his principles, particularly regarding the emotions, have implications for modern approaches to psychology. Even top thinkers have found Spinoza's "geometrical method" difficult to comprehend: Goethe admitted that he "could not really understand what Spinoza was on about most of the time." His magnum opus, Ethics, contains unresolved obscurities and has a forbidding mathematical structure modeled on Euclid's geometry.Spinoza's philosophy attracted believers such as Albert Einstein and much intellectual attention.

Gottfried Leibniz (1646–1716)
Leibniz was the last of the great Rationalists, who contributed heavily to other fields such as mathematics. His system however was not developed independently of these advances. Leibniz rejected Cartesian dualism, and denied the existence of a material world. In Leibniz's view there are infinitely many simple substances, which he called "monads" (possibly taking the term from the work of Anne Conway).

Leibniz developed his theory of monads in response to both Descartes and Spinoza. In rejecting this response he was forced to arrive at his own solution. Monads are the fundamental unit of reality, according to Leibniz, constituting both inanimate and animate things. These units of reality represent the universe, though they are not subject to the laws of causality or space (which he called "well-founded phenomena"). Leibniz, therefore, introduced his principle of pre-established harmony to account for apparent causality in the world.

Immanuel Kant (1724–1804)
Immanuel Kant started as a traditional rationalist, having studied the rationalists Leibniz and Wolff, but after studying David Hume's works, which "awoke him from his dogmatic slumbers", he developed a distinctive and very influential rationalism of his own, which attempted to synthesise the traditional rationalist and empiricist traditions.

Kant named his branch of epistemology Transcendental Idealism, and he first laid out these views in his famous work The Critique of Pure Reason. In it he argued that there were fundamental problems with both rationalist and empiricist dogma. To the rationalists he argued, broadly, that pure reason is flawed when it goes beyond its limits and claims to know those things that are necessarily beyond the realm of all possible experience: the existence of God, free will, and the immortality of the human soul. Kant referred to these objects as "The Thing in Itself" and goes on to argue that their status as objects beyond all possible experience by definition means we cannot know them. To the empiricist he argued that while it is correct that experience is fundamentally necessary for human knowledge, reason is necessary for processing that experience into coherent thought. He therefore concludes that both reason and experience are necessary for human knowledge.

All information is taken from Wikipeia

Bliss
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