The philosophy of Atheism represents a concept of life without any metaphysical Beyond or Divine Regulator. It is the concept of an actual, real world with its liberating, expanding and beautifying possibilities, as against an unreal world, which, with its spirits, oracles, and mean contentment has kept humanity in helpless degradation.” — Emma Goldman 

Atheism, broadly defined, means the lack of belief in the existence of any gods. The definition is sometimes disagreed with; there’s theists and sometimes atheists who would more narrowly define atheism as the affirmation that gods do not exist.

That particular forum of atheism is informally known as strong atheism while the lack or absence of belief in gods is sometimes called weak atheism or agnosticism. In his book The God Delusion, Richard Dawkins proposes a ‘spectrum of possibilities’ for different poles of certainty about god, in a similar fashion, and suggests that there’s different approaches one can take in defining one’s faith (or lack of it) in that regard. 

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