Once infected, the individual [infected with a god virus] cannot detect major contradictions in his beliefs and behavior. Belief systems become self-evident to him, and no amount of logical discourse will move him from his belief. If a Mormon and Catholic were to debate the merits of their respective religions, neither could see his own inconsistencies and logical fallacies, but would see the other's quite clearly.

Islam has some of the best defenses against other god viruses and has the potential to be more parasitically aggressive when consolidating political power with a society.

The lancet fluke (Dicrocoelium) infects the brain of ants by taking control and driving them to climb to the top of a blade of grass where they can be eaten by a cow. The ingested fluke then lays eggs in the cow gut. Eventually, the eggs exit the cow, and hungry snails eat the dung (and fluke eggs). The fluke enters the snail's digestive gland and gets excreted in sticky slime full of a seething mass of flukes to be drunk by ants as a source of moisture.

Have you ever observed somebody go through a religious conversion? The person seems perfectly reasonable to you and has no particular concern for religion. Then a parent, friend or child dies or he gets a serious illness or is involved in a car accident. In just a matter of weeks, he seeks out and finds the answers to all of life's questions and starts studying and spouting all sorts of doctrine. During such a window of vulnerability, religion can commandeer a person's brain.

Every religion ... has rituals, practices, holy writings or traditions, etc. Nothing like that has ever developed from Atheism. There are no holy men, holidays or holy books and no agreed-upon canons of faith. In fact, the only thing you can get some Atheists to agree upon is that there is no god.

All religions have something to say about sex, and it rarely coincides with scientific knowledge of sex and sexuality.

Some people who experience a religious conversion seem to undergo a personality change. They can be quite congenial and easygoing when talking about mundane things, but when they start talking about their faith, their demeanor changes. Their tone of voice modifies, their smile becomes tense and they become defensive when questioned about their evidence for belief. It becomes difficult to have a friendly conversation with them.