Everything is in your brain. Religious people have a brain different to the brain of agnostics and atheist
It is a matter of natural selection, and social biology. Our role as atheist and agnostics, since we are obviously smarter and rational, is to rule and manipulate people of faith
Here you can learn about "The God Helmet". It explains a little about the relationship between your brain and faith
I'd say that "honest" may not be the right word here, but I think that an Atheist Agnostic(they are not mutually exclusive, since you can be an atheist and still be open to the possibility of a God) possition is more realistic and more "honest" when it comes to the evidence. Or more precisely, the lack of evidence in favor of the existance of a god.