If, on the other hand, these are independent goods, then we shall require that the account of the goodness be the same clearly in all, just as that of the whiteness is in snow and white lead. But how stands the fact? Why of honour and wisdom and pleasure the accounts are distinct and different in so far as they are good. The Chief Good then is not something common, and after one ἰδέα. But then, how does the name come to be common (for it is not seemingly a case of fortuitous equivocation)? Are different individual things called good by virtue of being from one source, or all conducing to one end, or rather by way of analogy, for that intellect is to the soul as sight to the body, and so on? However, perhaps we ought to leave these questions now, for an accurate investigation of them is more properly the business of a different philosophy. And likewise respecting the ἰδέα: for even if there is some one good predicated in common of all things that are good, or separable and capable of existing independently, manifestly it cannot be the object of human action or attainable by Man; but we are in search now of something that is so.[14] It may readily occur to any one, that it would be better to attain a knowledge of it with a view to such concrete goods as are attainable and practical, because, with this as a kind of model in our hands, we shall the better know what things are good for us individually, and when we know them, we shall attain them. Some plausibility, it is true, this argument possesses, but it is contradicted by the facts of the Arts and Sciences; for all these, though aiming at some good, and seeking that which is deficient, yet pretermit the knowledge of it: now it is not exactly probable that all artisans without exception should be ignorant of so great a help as this would be, and not even look after it; neither is it easy to see wherein a weaver or a carpenter will be profited in respect of his craft by knowing the very-good, or how a man will be the more apt to effect cures or to command an army for having seen the ἰδέα itself. For manifestly it is not health after this general and abstract fashion which is the subject of the physician’s investigation, but the health of Man, or rather perhaps of this or that man; for he has to heal individuals.—Thus much on these points. Chapter IV.