I find the word "atheist" truly intriguing. In etymology, the construction of the word "atheist" defines it as "one who is without a god." During the times of the early church, Christians were labeled "atheists" by the Romans since they rejected their religion and their gods. The Romans perceived Christians as people who failed to worship the true gods and instead worshipped a Man (Jesus, and in turn God).
There is no true atheist in the world, however. The bible says that one cannot serve two masters, and that one must come to choose between earthly delights and the one true God. Biblically, it stands to reason that every man has a master, whether it be a drug addiction, money, sex, power, hatred, each other, or science. Everyone is, in a sense, a slave to a sin of some kind, and that sin becomes his or her god.
Therefore, according to this thinking, if you believe in anything, if you put any faith in anything, you are not an atheist. Atheism is not, in its literal sense, probable or even possible. Atheists today are those whom consider themselves to trust only in what they can see and believe, and yet many choose to believe in things they haven't seen, heard, touched, or even perceived in any way. Evolution, comes easily to mind: no one can definitely prove it, as no one was there, and thus it is accepted by faith. Even the faithless place their faith in something, even if it is themselves (I'm not saying there's anything wrong with confidence or healthy self-esteem, mind you).
Ultimately, what I am saying is that there is no one, not one, devoid of all faith or belief.