 He believed that, in order to achieve moral perfection, humans must be given free choice, with the actual possibility of choosing to do evil.Irenaeus argued that for humans to have free will, God must be at an epistemic distance (or intellectual distance) from humans, far enough that belief in God remains a free choice.Because Irenaeus saw the purpose of the world to be the development of the moral character of humans, he believed that a good world would be best suited to that purpose.