Our perceptions of objects in their perceivedness converge in a unity. When we see or hear we are not aware of our ears or eyes, “we do not see colour in our eyes, and we do not hear sounds in our ears…we see the colour on the book cover, we hear the sound of the door that someone slams.” (126) All these perceivable objects in their variety, converge in a “single sighted nature,” within “one region of the perceivable surroundings.” (127)
This single region of perceivability is there waiting to take in the plethora of perceptions that we have constantly to deal with. It does not originate from what we see, hear etc. Instead It is already there, waiting upon what converges in it, that which we constantly encounter in perception.
We have a sighted nature which holds up this region of perceivability, and which Plato calls soul. The soul is as one with this region itself: “This self-maintaining region which surrounds us belongs to ourselves, and is thereby a constant sameness;” it is “something in itself that is in or by ourselves.” (Plato) Therefore the soul is that which perceives, in the sense of “taking up the perceiving relationship to the perceivable.” This leads Plato to define the soul as that “which allows us to perceive all the objects of perception through the senses as instruments.”
Next post: Soul and Body Previous post: The Role of the Body
Socrates begins his enquiry into the essence of perception by asking about the role of the senses, and by extension the body. It would appear that perception is the relation between what is immediately perceivable, smells, colours, sounds etc, and that which is able to take up a perceiving relationship with them. For smells that is the nose, for colour the eyes, etc. Does this mean that it is the body, through the senses, which has a perceptual relationship with what appears? Or is perception only achieved in passing through them, i.e. are the senses just a passageway to perception?
The second characterisation is agreed upon, with Socrates providing the proof: If perceiving was dispersed to different points on the body, so that the eyes are that which see, the ears that which hear etc, what we see and hear, colour and sound, would also be distributed to the corresponding points on the body. This would mean in order to see we would have to direct ourselves to our eyes, in order to hear we would have to direct ourselves to our ears. The end result would be that we could not hear and see something simultaneously.
This is an impossible state of affairs, therefore its opposite is acknowledged, every perception, rather than being dispersed to various points on the body, converges in a unity. This is not a bodily unity, for the body upholds the dispersion of perceiving through its organs of perception. Instead this unity is the “single sighted nature” that we possess, in which all sensory perceptions converge “in something like an idea” [i.e. knowledge]. The idea is what is sighted, it is both seeing and what is seen in its presence, i.e. it is the thing’s essence that is immediately present before us. (126)
Next post: The Soul Previous post: The First Answer
The first answer that Theaetetus offers in response to Socrates’ question: “what is knowledge?” is that knowledge is perception (aisthesis). Heidegger then asks how this answer is arrived at, what is it in perception that appears to link it to knowledge, understood as the “possession of truth,” and thus to being.
For the Greeks the becoming perceived of something in perception is the same as phantasia. This is what a thing appears as, what it shows itself as, its appearance. Accordingly that which we perceive in a perception is there in a state of being perceived, which we take for what it presents itself as. Heidegger gives an example: “the moon itself that appears in the sky, that presents itself and is present; this is something that shows itself.” The moon shows itself as being present, which we take for what it shows itself as, the moon. Therefore aisthesis has a double meaning relating to the perceived in its perceivedness, and the perception in which perceivedness occurs.
Therefore Theaetetus’ thesis is that knowledge, as truth, is this perceivedness of what is seen. That which we perceive in a perception is there before us as something that shows itself as present, as “a kind of unhiddenness.” Perception, aisthesis, is equated with truth as unhiddenness, aletheia, because it “appears the most immediate mode of the unhiddenness of something…the most tangible truth.”
Yet it is still open to question that what becomes manifest in this relationship, between what shows itself and perception, is being. For this to be the case our “perceptual comportments,” seeing, hearing etc, through which we have a perception, must “have a relationship to beings as such.” To test whether or not this is the case Heidegger’s analysis focuses on the essence of perception itself, asking whether or not a perceptual comportment “can bring itself into a relationship to beings as beings, such that the unhiddenness of beings is given in the perceivedness occurring in such a comportment.” (121)
Next post: The Role of the Body Previous post: Socrates’ Question
Plato’s Theaetetus is a dialogue, in which the leading question: “what is knowledge?” is posed by Socrates to Theaetetus. Knowledge, a translation of epistememe, has two meanings; it is a practical know-how, which “extends across all possible human activities,” from how to make a pair of shoes to how to conduct a war. It is also understood as seeing or idein. What unites both is their relationship to beings in their unhiddenness, their truth. Seeing is the seeing of beings in their presence, as what they show themselves for. Similarly know-how is disposal over beings in their presence, in their unhiddenness. This leads Heidegger to define knowledge as: “knowing-one’s-way-around in something as the possession of truth.” (120)
Next post: Theatetus’ First Answer Previous post: The Aviary Blog – Introduction
Martin Heidegger’s The Essence of Truth (2002) contains two connected lecture series on two of Plato’s Socratic dialogues (Politeia and Theaetetus), which Heidegger uses to address the theme of truth. In particular the Greek idea of truth as aletheia, which means unhiddenness, in contrast to our understanding of truth as correctness, given by the Latin term veritas.
The Essence of Truth is part of Heidegger’s project to bring into the open what he believes we have long forgotten, that is being, that which is present in addition to what is physically there. Being is experienced as aletheia, i.e. as what is unhidden. He proposes that this return to being as aletheia be re-enacted by examining the essence of truth, i.e. by asking “what is truth?” In order to do this aletheia itself must be put into question by exploring what beings are prior to unconcealment, i.e. as hidden, as untruth. This is what Heidegger sets out to do in part two of The Essence of Truth: “an interpretation of Plato’s Theaetetus with respect to the question of the essence of untruth.”
In the following blog posts I have tracked Heidegger’s engagement with Plato’s text through a series of detailed notes which endeavour to capture what is being said.
Next Post: Socrates’ Question