The idea that there are two aspects to
human beings, the physical and the mental.
The mental may be identified with the soul.
Materialism
The idea that human beings are made up of one
substance, the word is often used synonymously
with materialism.
Monism
The idea that human beings
consist of physical matter
alone.
Plato's beliefs
Plato was a dualist. He believed that the body
would not survive death but the soul, the real
essence of the person would continue – and for
Plato this is our PERSONAL IDENTITY, which forms
the ‘I’.
A human is a ‘soul imprisoned
in a body’
The body is subject to change – so not
reliable guide to truth
Real knowledge (of the forms) comes from the
soul
The soul is immortal whereas the body is
mortal. - At the end of life the soul will be
set free.
The body is a distraction to the
soul.
The goal of the soul is the world of the
Forms.
Chariot analogy
Charioteer = reason
Black horse = desire
White horse = emotion
Reason = searches for
truth and rules the soul
Emotion =
aggressiveness, being
honourable and
emotions
Desire = seeking pleasure
e.g. for what is necessary
and what is unnecessary
Argument from knowledge
The soul has knowledge of eternal ideas and is
able to recognise forms such as beauty.
Plato uses the example of Socrates
questioning a slave boy about
geometrical problems he had never
faced before.
The slave’s answers demonstrate an
awareness of Pythagoras’ theorem,
which demonstrates that the soul has
knowledge from its prior existence.
Learning is therefore remembering.
Argument from opposites
The body and soul are opposites. One makes the other
necessary just as the concept of light logically makes us
aware of the idea of darkness.
Life and death are two opposite things. Plato argues that death is a
thing (rather than nothingness) and this leads him to suggest that
death is an event, the soul leaving the body.
Weaknesses of beliefs
Peter Geach – rejects Plato’s ideas. What can it mean for the
disembodied soul to see the Forms? Seeing is an experience
of the senses.
Is learning really remembering? Is it
not new knowledge? Does the
argument from opposites really
demonstrate the existence of the
soul?
Plato’s argument about the soul rests on theory of Forms, but the theory of
Forms is debatable.
Aristotle's beliefs
In his writings the soul is a translation of the Greek
word psyche So the soul is conceived as whatever
is the cause of something alive. Soul was seen as
‘life giving force of the body’
The meaning did not correspond with the idea that
the soul is the centre of a person’s identity that
survives after death
Substance
For Aristotle the soul was a
‘substance’ which meant ‘essence’ or
‘real thing
If the physical body is in a state of
change the ‘substance’ must remain
the same in terms of continuing
identity.
This was called the soul The soul
gives something its telos -
purpose
Analogy
Aristotle used the analogy of a wax with a stamp in
it to illustrate his idea that the soul could not be
separated from the body
The soul was not a distinct and
self-contained thing – the ‘soul’ of
something could be seen in its
function/purpose
Aristotle used these
examples: Axe – axe
and chopping Eye – eye
and vision
The soul cannot be separate from the body
– for example without the physical material
(eye, axe) there would be no vision or
chopping.
The soul is the Form of the body
The soul gives shape to the matter which is
the body
The soul is the principle of life
or activity of the body
The soul is merely a description of the essence or
properties of the body – personality and abilities
The body is not just a prison for the soul
(Plato)
Life after death
The soul is perishable as it
is inseparable from the
body – so it does not live on
– our personality or identity
does not live on
However – Aristotle believed that our
reason/intellect could be immortal –
therefore there is some form of intellectual
post-mortem existence
Evaluation
Emphasis on senses – but can we trust
our senses Religious people argue we
know the world through faith and
revelation
Does the universe have a purpose/final
cause? Many argue there is no purpose
Separation of reason from soul is confusing –
thought continuing is not personal identity
Aristotle’s ideas
influenced Christianity –
resurrection (soul not
distinct from body, united
together)
Descartes
He was a rationalist – true knowledge can only
be gained through the use of reason and
rational thought. Rational thought led
Descartes to consider that the soul is
separate from the body
‘I think, therefore I am.’
He doubted that everything else existed
including the physical body, the fact that
he was performing mental activity meant
that his mind existed.