 The purpose however is for Velleius to show that the Epicurean idea of God as a perfectly happy, eternal being, possessed of reason, and in human form, is the only tenable one, and the other differing opinions is regarded as proof of their worthlessness.In the remainder of the book, Cotta attacks the positions of Velleius with regard to the form of the gods, and their exemption from creation and providence.In Book 2, Balbus gives the Stoics' position on the subject of the gods.