There seems to be more plausibility in the doctrine of the Pythagoreans, who [in their table of opposites] place the one on the same side with the good things [instead of reducing all goods to unity]; and even Speusippus 8 seems to follow them in this.

However, these points may be reserved for another occasion; but objection may be taken to what I have said on the ground that the Platonists do not speak in this way of all goods indiscriminately, but hold that those that are pursued and welcomed on their own account are called good by reference to one common form or type, while those things that tend to produce or preserve these goods, or to prevent their opposites, are called good only as means to these, and in a different sense.

It is evident that there will thus be two classes of goods: one good in themselves, the other good as means to the former. Let us separate then from the things that are merely useful those that are good in themselves, and inquire if they are called good by reference to one common idea or type.