You are either a theist, atheist or agnostic.

What is theism, atheism and agnosticism? Douglas Krueger wrote a few words that showed me a side of the three words I’ve never seen before. Really enlightening.

I suggest you read the whole essay here:
http://www.2think.org/hii/atheism.shtml

Here are a few quotes from the essay that caught my eye:

Atheism

• Perhaps the biggest reason the above words are misunderstood is that theists tend to define atheism, atheists tend to define theism, and people who call themselves agnostics don't want to belong to either of the definitions the other two parties have given to each other.
  


• Although some atheists (and they are in the minority) may claim to know that there is no god, most atheists claim no such thing. Atheism is a "lack of belief in god" and nothing more. Those who claim to "know" there is no god are sometimes referred to as "strong atheists", but their thinking is as faulty as those who claim to know that there is a god.
  


• For now, let me just state that no one can know there is no god for the same reason that no one can know there is no Santa Claus, Easter Bunny, unicorn, or other such creature.
  


• To summarize, atheism is a lack of belief in god. Basic atheism (of the non-strong variety) on its own does not positively assert anything regardless of what some atheists may say or think and regardless of what theists frequently define as atheism.
  

Theism

• Theism is simply the opposite of atheism. A good definition of theism is "a positive assertion that god does exist".
  


• Based on these two definitions, everyone is either a theist or an atheist.
  


• Either you positively assert that there is a god or you lack such a positive assertion. There is no middle ground--which brings us to our third word of agnosticism.
  

Agnosticism

• When you break down the word agnostic, you come up with a term meaning "without knowledge" or "unknowable".
  


• The word has changed meaning over the years, and people have tended to use the term as a sort of middle ground between atheism and theism. In my opinion, such a middle ground doesn't exist.
  


• One either asserts that there is a god or they lack such an assertion.
  


• Agnostics have labeled themselves as such because they don't understand the definition of atheism or because they have heard only about the 'strong atheists' who do make a positive assertion that there is no god and they don't personally hold such a strong assertion.
  

Conclusion

• My (modern) definition is that virtually everyone is an agnostic. That's right, almost everyone is either an agnostic/atheist or they are an agnostic/theist because no one can 'know' god. Atheists probably don't have a problem with this definition, but I'd be willing to bet that many theists who are reading this don't appreciate being labeled an agnostic.
  


• Many who believe in god don't claim any first hand knowledge.
  


• The slightly-more-difficult-to-dub agnostic variety of theists are those that claim first hand knowledge. The main problem with these people is this first hand knowledge they assert is always based on personal experience rather than any sort of tangible proof or external evidence.
  


• The issue with these claims, and my reason for still labeling these people as agnostics, is that all of their personal experiences, 1) more or less contradict the personal experiences of others who claim this same 'knowledge' and 2) can't be shown to others (especially skeptics, scientists, or others who want to see proof).
  

To conclude and summarize, both you and I are agnostics. Almost everyone is an agnostic (in the modern sense of the word) since none of us have any evidence, proof, or other tangible means of giving knowledge regarding any of the various versions of god that the masses currently believe in or have believed in the past. The few people who truly believe that they can prove or disprove the existence of god(s) probably could not be classified as agnostics under this frame of thought (although even this is debatable as one person's "proof" can be pure nonsense to another and would, therefore, leave the non-agnostic status only in the eyes of the person claiming the illogical "proof"). Everyone is either a theist or an atheist. If you answer the question, "Do you believe in god?" with an affirmative, then you are a theist. If your answer is "no" or "I don't know" then you are an atheist due to your lack of an affirmative belief.