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Chapter 12: Forms
I.12.heading · Wachsmuth pp. 134
On forms.
1a ⟨Aëtius, Opinions⟩: the definition
I.12.1a.1 · Wachsmuth pp. 134
A form is an incorporeal substance, the cause of things being such as it itself is, and a pattern for the subsistence of sensible things constituted according to nature.375 It subsists on its own [in], but impresses its likeness upon formless materials and becomes the cause of their ordering, occupying the position of a father in relation to sensible things.376
1a ⟨Aëtius, Opinions⟩: Pythagoras
I.12.1a.2 · Wachsmuth pp. 134
Pythagoras placed the so-called forms and ideas in numbers, in their harmonies, and in what are called geometrical entities, holding them to be inseparable from bodies.377
1b ⟨Arius Didymus⟩: Aristotle, part 1
I.12.1b.1 · Wachsmuth pp. 134-135
Aristotle. Aristotle sometimes says that these principles are two, matter and form. He also calls form “shape,” “actuality,” “essence,” “substance according to its account,” and “activity”: so rich in meaning and so variously named is form for him.378
Form, then, differs from shape in this respect: form extends through the depth, whereas shape lies on the surface. Shape is like whiteness ⟨as found⟩ in painting, while form is like the whiteness belonging to the substance of milk. Yet both are called form, insofar as one gives matter form and the other gives it shape.379
1b ⟨Arius Didymus⟩: Aristotle, part 2
I.12.1b.2 · Wachsmuth pp. 135
⟨And⟩ he called it “actuality” either because it exists continuously or because it renders complete each of the things that participate in it. For bronze is not yet a statue except potentially; once shaped and endowed with the appropriate form, however, it is called a statue in actuality, for it has then attained its end.380
1b ⟨Arius Didymus⟩: Aristotle, part 3
I.12.1b.3 · Wachsmuth pp. 135
He called it “essence” because it confers on each existing thing the capacity to be; and “substance according to its account” because it differs from substance according to matter, as a statue differs from bronze, a Thericlean cup from silver, and any sculpted image from stone. For that by which these exceed the matter from which they have been fashioned is their substance according to its account.381 He called it “activity” because none of the things that exist could act without first having been given form.382
2a ⟨Arius Didymus⟩: Plato, part 1
I.12.2a.1 · Wachsmuth pp. 135-136
⟨Plato.⟩ He expounded the forms as follows, saying that they are certain determinate patterns corresponding to the several natural sensible things, from which knowledge and definitions arise. For besides all human beings a certain human being is conceived, and besides all horses a horse, and, generally, besides living creatures a living creature that is ungenerated and imperishable. Just as many impressions come from one seal and many likenesses from one man, so from each single form come countless natures of sensible bodies: all human beings from the form of human beings, ⟨and all horses from the form of horses⟩; the same account applies to the other things that exist by nature.383
2a ⟨Arius Didymus⟩: Plato, part 2
I.12.2a.2 · Wachsmuth pp. 136
A form is an eternal substance, the cause and principle of each thing’s being such as the form itself is. Just as the particular forms have priority over sensible bodies as their archetypes, so the most beautiful and most perfect substance, containing all the forms within itself, is ⟨the pattern of this world⟩.384
2b Plato, Parmenides (132c-d)
I.12.2b · Wachsmuth pp. 136
He says, indeed, in the Parmenides as well: “But, Parmenides, this is how the matter seems most clearly to me: these forms stand in nature as patterns, and the other things resemble them and are likenesses of them; and this participation of the other things in the forms is nothing other than their being made like them.”385
3 ⟨Arius Didymus⟩: Zeno, part 1
I.12.3.1 · Wachsmuth pp. 136-137
Zeno ⟨and his followers⟩. They say that concepts are neither somethings nor qualified things, but images in the soul that are, as it were, somethings and, as it were, qualified things. These were called “ideas” by the ancients. For the ideas are of things falling under the concepts: for example, human beings and horses, or, more generally, all living creatures and all the other things of which they say there are ideas.386
3 ⟨Arius Didymus⟩: Zeno, part 2
I.12.3.2 · Wachsmuth pp. 137
The Stoic philosophers say that these do not subsist, and that we participate in the concepts but obtain the “cases,” which they call “appellations.”387