Abstract
My main aim is only to prepare for the interpretation of the Idea of Good. In his famous commentary J. Adam says that the Good is not ουσια in the sense in which the Ideas are ουσιαι, but in a higher sense it is the only true ουσια. I think this is right. And if so, it also may be right to suppose that there are two types of αληθεια. But he says nothing of this, and his notes on αληθεια are very much confused. I dare to suggest that the Idea of Good is the only true αληθεια and the Ideas are αληθεια.
