It means the absense of belief in god or gods.
Atheism
Athesium is not a recognized term in scientific literature or common usage. It may be a typographical error or a misspelling of "athesium." If you meant "atheism," it refers to the lack of belief in the existence of deities or gods. Please clarify if you meant something else or provide additional context for a more accurate response.
The proper term is Atheism, or Anti-Theism if you are against religion.
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Since atheism is not a religion or a belief system but an absence of those things, it has no sacred text, no tenets, no dogma. In addition the term "sacred" implies "handed down by a god". In atheism there is no god, therefor no handing down, therefore no text
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Nontheism is a broader term that encompasses any belief system that does not involve a belief in a god or gods. Atheism specifically refers to the lack of belief in a god or gods. In other words, atheism is a type of nontheism, but not all nontheists are necessarily atheists.
There are no atheist founders. Atheist is simply a term to describe people who do not hold a belief in God.
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