Book XII Chapter 3

Note, next, that neither the matter nor the form comes to be-and I mean the last matter and form. For everything that changes is something and is changed by something and into something. That by which it is changed is the immediate¹ mover; that which is changed, the matter; that into which it is changed, the form. The process, then, will go on to infinity², if not only the bronze comes to be round but also the round or the bronze comes to be; therefore there must be a stop.

Note, next, that each substance comes into being out of something that shares its name. (Natural objects and other things both rank as substances.) For things come into being either by art or by nature or by luck or by spontaneity. Now art is a principle of movement in something other than the thing moved, nature is a principle in the thing itself (for man begets³ man), and the other causes are privations of these two.

There are three kinds of substance-the matter, which is a ‘this’ in appearance (for all things that are characterized by contact and not, by organic unity⁴ are matter and substratum, e.g. fire, flesh, head; for these are all matter, and the last matter is the matter of that which is in the full sense substance); the nature, which is a ‘this’ or positive state towards which movement takes place; and again, thirdly, the particular substance which is composed of these two, e.g. Socrates or Callias. Now in some cases the ‘this’ does not exist apart from the composite substance, e.g. the form of house does not so exist, unless the art of building exists apart (nor is there generation and destruction of these forms, but it is in another way that the house apart from its matter, and health, and all ideals of art, exist and do not exist); but if the ‘this’ exists apart from the concrete thing, it is only in the case of natural objects. And so Plato was not far wrong when he said that there are as many Forms as there are kinds of natural object (if there are Forms distinct from the things of this earth). The moving causes exist as things preceding the effects, but causes in the sense of definitions are simultaneous with their effects. For when a man is healthy, then health also exists; and the shape of a bronze sphere exists at the same time as the bronze sphere. (But we must examine whether any form also survives afterwards. For in some cases there is nothing to prevent this; e.g. the soul may be of this sort-not all soul but the reason; for presumably it is impossible that all soul should survive.) Evidently then there is no necessity, on this ground at least, for the existence of the Ideas. For man is begotten⁵ by man, a given man by an individual father; and similarly in the arts; for the medical art is the formal cause of health.

1 immediate   

adj.立即的；直接的，最接近的；紧靠的

参考例句：

• His immediate neighbours felt it their duty to call.他的近邻认为他们有责任去拜访。
• We declared ourselves for the immediate convocation of the meeting.我们主张立即召开这个会议。

2 infinity   

n.无限，无穷，大量

参考例句：

• It is impossible to count up to infinity.不可能数到无穷大。
• Theoretically,a line can extend into infinity.从理论上来说直线可以无限地延伸。

3 begets   

v.为…之生父( beget的第三人称单数 )；产生，引起

参考例句：

• It begets at least seven standard type offspring from such matings. 这类交配中生下至少七个标准型后代。 来自辞典例句
• Violence begets violence until the innocent perish with the guilty. 暴力招致暴力直到这因罪行而无缘无故的毁灭。 来自电影对白

4 unity   

n.团结，联合，统一；和睦，协调

参考例句：

• When we speak of unity,we do not mean unprincipled peace.所谓团结，并非一团和气。
• We must strengthen our unity in the face of powerful enemies.大敌当前，我们必须加强团结。

5 begotten   

v.为…之生父( beget的过去分词 )；产生，引起

参考例句：

• The fact that he had begotten a child made him vain. 想起自己也生过孩子，他得意了。 来自辞典例句
• In due course she bore the son begotten on her by Thyestes. 过了一定的时候，她生下了堤厄斯式斯使她怀上的儿子。 来自辞典例句