  Descartes had a different account. He held that the eternal truths are the free creations of God (1:145, 149, 151; 7:380, 432), originating from him in a way that does not distinguish among his power, will, and intellect. God  decides what the essence of a circle is, or to make 2 + 3 = 5. He might have created other essences, although we are unable to conceive what they might have been. Our conceptual capacity is limited to the innate ideas that God has implanted in us, and these reflect the actual truths that he created. God creates the eternal truths (concerning logic, mathematics, the nature of the good, the essences of mind and matter), and he creates the human mind and provisions it with innate ideas that correspond to those truths. However, even in this scheme there must remain some eternal truths that are not created by God: those that  pertain to the essence of God himself, including his existence and perfection (see Wells 1982).