"The idea of evil as it appears in modern secular thought is an inheritance from Christianity. To be sure, rationalists have repudiated the idea; but it is not long before they find they cannot do without it. What has been understood as evil in the past, they insist, is error – a product of ignorance that human beings can overcome. Here they are repeating a Zoroastrian theme, which was absorbed into later versions of monotheism: the belief that ‘as the “lord of creation” man is at the forefront of the contest between the powers of Truth and Untruth.’ But how to account for the fact that humankind is deaf to the voice of reason? At this point rationalists invoke sinister interests – wicked priests, profiteers from superstition, malignant enemies of enlightenment, secular incarnations of the forces of evil. As so often is the case, secular thinking follows a pattern dictated by religion while suppressing religion’s most valuable insights. Modern rationalists reject the idea of evil while being obsessed by it. Seeing themselves as embattled warriors in a struggle against darkness, it has not occurred to them to ask why humankind is so fond of the dark. They are left with the same problem of evil that faces religion. The difference is that religious believers know they face an insoluble difficulty, while secular believers do not. Aware of the evil in themselves, traditional believers know it cannot be expelled from the world by human action. Lacking this saving insight, secular believers dream of creating a higher species. They have not noticed the fatal flaw in their schemes: any such species will be created by actually existing human beings."