I'd have to agree with cgod. It's too thick to read comfortably. It feels to me that you try to prove a lot of different things all at once. As well, there's some word choices that hinder your overall readability. Take the first sentence:

It is important, I believe, when discussing this topic of atheism and its impact on our world, to first state that, hitherto my analysis of the subject, I have undergone a religious journey of sorts by which I have been led to the undeniable conclusion that the truth of existence which is beyond known existence is unknown or unknowable.

You've got a fair few things going on in here.

It is important, I believe, when discussing this topic of atheism and its impact on our world, to first state that,

"I'm about to give a qualifier that will explain my thinking."

hitherto my analysis of the subject,

"This is something that I've thought of a while ago."

I have undergone a religious journey of sorts by which I have been led to the undeniable conclusion that the truth of existence which is beyond known existence is unknown or unknowable.

"My past religious experiences have drawn me to the conclusion that 'the truth of spiritual existence' cannot be perceived."

This is a lot of different things to pack into a sentence, and this really "densely-packed" structure goes on for the rest of this essay. While reading it, I find myself needing to go back and re-read because I've forgotten how it started. That problem is multiplied by the lack of line breaks/other formatting.

Now moving on to the next sentence:

Such an agnostic belief as this which I do presently hold is not justified or properly defined by just the term "agnostic."

This sentence is easier to understand (shorter length), but is still organized in a confusing way. The first part "Such an agnostic belief as this which I do presently hold" could be easily replaced with "This belief". With some other changes:

This belief is not properly defined by the term "agnostic."

There's some other stuff here, but cgod summed it up better than I've done so far. Thanks for posting it, it was an interesting read.