Again, we choose a thing when we know well that it is good; we may have an opinion about a thing of which we know nothing.
Again, it seems that those who are best at choosing are not always the best at forming opinions, but that some who have an excellent judgment fail, through depravity, to choose what they ought.
It may be said that choice or purpose must be preceded or accompanied by an opinion or judgment; but this makes no difference: our question is not that, but whether they are identical.
What, then, is choice or purpose, since it is none of these?
It seems, as we said, that what is chosen or purposed is willed, but that what is willed is not always chosen or purposed.