The human brain is irrational.

Atheists and Christians are equally irrational.

We are rationalizing creatures. No one can claim the monopoly on reason – no matter how much atheists try.

” These two systems interact in complicated ways, and in general, the emotional brain has precedence over the rational brain. It takes a lot of work to get the rational brain to shut down the emotional brain and look at things in a reasonable way.

And even the rational brain, located in the pre-frontal cortex, is not a strictly logical system. It’s actually a giant system of pattern recognition. So we’re programmed not to think about things strictly rationally but to form patterns, put things into categories and make decisions based on these categories. It’s a categorical rather than a strictly logical kind of reasoning, which leads to all kinds of violations of basic economic precepts.”

- http://www.research.lsu.edu/massey07.shtml