The Forms are said to be the things themselves of which things in the visible world are images, but what do we know of Forms beyond what we are told? Have any of us seen the Forms themselves with the mind itself, or do we only imagine what they might be? In none of the dialogues is there anyone who has seen the Forms and is able to give an account of their experience, There are only questionable stories of what we see when we are dead.
In the Phaedo Socrates calls the hypothesis of Forms “safe and ignorant” (105c). In addition to the Forms, he later recognizes the necessity of admitting physical causes such as fire and fever (105c). As to the causal relationship between Forms and sensible things, he says:
I simply, naively and perhaps foolishly cling to this, that nothing else makes it beautiful other than the presence of, or the sharing in, or however you may describe its relationship to that Beautiful we mentioned, for I will not insist on the precise nature of the relationship, but that all beautiful things are beautiful by the Beautiful. (100e)
In the Philebus Plato introduces what Aristotle refers to as the indeterminate dyad, the limited (peras) and unlimited (apieron). Contrary to the fixed, unchanging nature of the Forms, indeterminacy is an ineliminable element of Plato’s metaphysics.
Plato’s metaphysics is not systematic. It is problematic. It raises questions it cannot answer and problems that cannot be resolved. It is important to understand that this is a feature not a defect or failure.
Plato’s concern is the Whole. Forms are not the Whole. Knowledge of the Forms is not knowledge of the whole.
These dyads include:
Limited and Unlimited
Same and Other
One and Many
Rest and Change
Eternity and Time
Good and Bad
Thinking and Being
Being and Non-being
Each side stands both together with and apart from the other. There is not one without the other.
Ultimately, there is neither ‘this or that’ but ‘this and that’. The Whole is not reducible to One. The whole is indeterminate.
And yet we do separate this from that. Thinking and saying are dependent on making such distinctions.
We informally divide things into kinds. Forms are kinds.
Forms are both same and other. Each Form is itself both other than the things of that Form, and other than the other Forms.
The Forms are each said to be one, but the Forms and things of that Form are an indeterminate dyad, one and many.
The indeterminate dyad raises problems for the individuality and separability of Forms. There is no “Same itself” without the “Other itself”, the two Forms are both separable and inseparable.
Socrates likens the Forms to originals or paradigms, and things of the world to images or copies. This raises several problems about the relation between Forms and particulars, the methexis problem. Socrates is well aware of the problem and admits that he cannot give an account of how particulars participate in Forms.
Things are not simply images of Forms. It is not just that the image is distorted or imperfect. Change, multiplicity and the unlimited are not contained in unchanging Forms.
The unity of Forms is subsumed under the Good. But Socrates also says that the Good is not responsible for the bad things. (Republic 379b)
The Whole is by nature both good and bad.
The indeterminate dyad Thinking and Being means that Plato’s ontology is inseparable from his epistemology.
Plato’s ontology must remain radically incomplete, limited to but not constrained by what is thought.
The limits of what can be thought and said are not the limits of Being.
The Timaeus introduces three kinds:
… that which comes to be, that in which it comes to be, and that from which what comes to be sprouts as something copied. And what’s more, it’s fitting to liken the receiver to a mother , the ‘from which’ to a father, and the nature between these to an offspring (50d).
Like intelligible things, the chora always is. But unlike intelligible things, it is changeable. (52a) Unlike sensible things it does not perish. Befitting its indeterminacy, the chora does not yield to simple definition.
Metaphysics for Plato was speculative and contemplative play, a form of poiesis, the making of images of the whole and parts. Without knowledge of beginnings that are forever lost to us he is saying that we cannot take any of this too seriously as true accounts. But that is not to say that we should not take such play seriously.
It may appear as though the Timaeus is a departure for Plato, but it is consistent with Socratic skepticism. An indeterminate world, one where chance and contingency play a role, is a world that cannot be known. An indeterminate world of chance and contingency is one where the unknowable, the mystical dimension of life, is not flattened and destroyed.