Notes for my
tutorial – any feedback is always most welcome.
Introduction
René Descartes (1596 -1650) is regarded as the
father of modern westernised philosophy. His Cartesian (Latin
translation of his name ) philosophy is that ‘I
am certain that I can have no knowledge of what is outside me except by means
of the ideas I have within me.’
Hence
Descartes' theory of ideas have contributed immensely to influence philosophical
enquiry from the seventeenth century but are difficult to pin down.
But he is more famously known for his statement I
think therefore I am. His influence permeated philosophical enquiry to be largely
unchallenged for nearly 3 centuries. He talks about the immaterial mind which is our consciousness where our
soul resides. According to Descartes our consciousness
is an essence arising from the perfect substance attributable to GOD, distinct
to that of the body. Hence the minds ascension over the bodies’ senses is the
GOD given means we need not be deceived by our senses. The immediate reaction
you may have is to query what he means in this context by the use of word substance.
Substances
Note the 17th century philosopher’s
use is quite different to its meaning today as it was meant then to denote the
ultimate constituents of reality.
Descartes
draws a distinction between a substance which is a thing that doesn’t depend on any other things (a material thing such as
a rock) and the created substance which do depend
on other things. GOD therefore is the perfect
substance, so that the body is an extension as he call it, only guided by the senses.
Later on Descartes ignores the distinction between
GOD and creation to define a substance in a more general way. A substance is
subject to varying modes but can’t be a mode of anything else.
In summary then there are 2 types of created substance—thinking
substances and extended substances. So that each created substance has
one attribute to constitute its nature and essence. Descartes means thinking
substances are ‘mind’ and hence the body is an extended substance.
Influencing factors
As a scientist Descartes wanted to develop a
foundation in philosophy that was based on rational scientific theory that
could not be doubted. At that time religious thinking was supported by
Plato’s idea that a virtuous life was a happy one. But one first needs to have
a knowledge of how one is to live a virtuous life. Aristotle expanded upon
those circumstances with additional categories and an elaborate system of
logic. But as to how one has that
knowledge and the nature of a belief in GOD, that was a matter for the church
and the ecclesiastical bodies that represented its dogma.
But as new ideas and discoveries permeated the
landscape a growing disquiet and doubt grew as many found issue with religious
beliefs.
Galileo had narrowly avoided the ‘rack’ by renouncing
his views whilst others were less fortunate such as Giordano Bruno. He was
influenced by Copernicus 1473-1543, who refuted the idea the earth was the
fixed central point of importance in the universe. This was at odds with the
strict biblical interpretation of Creation: ‘GOD fixed the Earth upon its
foundation, not to be moved forever’
Bruno embraced an expended world view that made
room for ancient wisdom streams. In 1600, Pope Clement VIII and the congregation ordered his works be
prohibited and found him guilty of heresy. Appeals from his monastery were
ignored and with a metal bit rammed into his mouth he was stripped, tied to a
stake and, accompanied by the chants of the Confraternity, burned alive.
This no doubt was to have a profound impact on
Descartes, who mentions in his letters the need to avoid any theological
controversies.
But nevertheless in his Discourse on Method he
argues against Aristotelian logic. For anyone wishing to peruse this matter
Spark Notes provides a reference point.
However
what emerges out of Aristotelian logic in modernity today may not have been
what was taught at university to Descartes as a Jesuit student.
For
some philosophers suggest he appears to argue erroneously against Aristotelian
logic. For what was written by Aristotle over a thousand years previously could
have misinterpreted or even corrupted by those in power at the time of
Descartes.
Descartes
meditations
He begins by asking the
question how one can be sure of anything. Due to his training as a scientist,
he wanted to formulate a scientific philosophy predicated on a logically reasoned basis that
avoided being deceived.
He decides that he cannot doubt his own existence
as a thinking thing. His conclusion is that the mind is better known to him
than the body which is just governed by the senses. The mind represents his
consciousness which is where the soul resides.
GOD is the perfect substance and its pure essence is
represented in the mind to ensure we are not fooled by the senses. That is the only place where learning can take
place. Hence, like a skilled craftsman GOD stamped his pure essence in the mind
in order that one would not be deceived by the senses.
In summary the central theme argued is a mind body dualism
that proposes the mind is separate to the body. But it is difficult to know
just how far Descartes wants us to believe the body is entirely separate and
distinct to the mind. How could one exist without paying close attention to the
sensory signals and learning from an environmental perspective?
A critique and
conclusion
Although Descartes acknowledges the secondary role
of the senses he doesn’t seem to leave room for the emotions.
Descartes attributes the senses as a kind of sub
strata to the minds essence which have no influence over it. Therefore he does
not entertain the idea of any central role that feelings might play in
prompting us to think about things in general or in prompting learning. One
might also say we simply see things differently in a material sense as between
physical objects as opposed to mental representations for nonphysical things.
Modern day evidence of what must happen when a human brain is
damaged by way of severe trauma, demonstrates that mental powers are always effected.
This points to the idea that the brain and the mind are not separate. However
there is plenty of room left for mystery in our amazingly complex human brains.
But one might conclude about what we do know is our
consciousness is represented by a whole of body experience, brought to clarity
in the frontal brain lobes. The question of a Cartesian separatism seems unlikely
but remains open to debate.
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