" Since now thou hast seen what is the form of the imperfect good, and what the form of the perfect also, methinks I should next show in what manner this perfection of felicity is built up. And here I conceive it proper to inquire, first, whether any excellence, such as thou hast lately defined, can exist in the nature of things, lest we be deceived by an empty fiction of thought to which no true reality answers. But it cannot be denied that such does exist, and is, as it were, the source of all things good.