Atheism is not a philosophy; it is not even a view of the world; it is simply an admission of the obvious.

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.

Atheism is a non-prophet organization.

"No it's not!" said Constable Visit. "Atheism is a denial of a god."

"Therefore It Is A Religious Position," said Dorfl. "Indeed, A True Atheist Thinks Of The Gods Constantly, Albeit In Terms of Denial. Therefore, Atheism Is A Form Of Belief. If The Atheist Truly Did Not Believe, He Or She Would Not Bother To Deny."

Atheism is a religion like not collecting stamps is a hobby.

An atheist is someone who is certain that God doesn't exist, someone who has compelling evidence against the existence of God. I know of no such compelling evidence.

Saying atheism is a belief system is like saying not going skiing is a hobby.

To be an atheist is to maintain God. His existence or his non existence, it amounts to much the same, on the plane of proof. Thus proof is a word not often used among the Handdarata, who have chosen not to treat God as a fact, subject either to proof or to belief: and they have broken the circle, and go free.
To learn which questions are unanswerable, and not to answer them: this skill is most needful in times of stress and darkness.

An atheist is a person who believes that the murder of a single little girl — even once in a million years — casts doubt upon the idea of a benevolent God.

An atheist is a man who has no invisible means of support.

The absence of theistic belief...

{<i>Defining the word 'atheism'</i>}

I feel the gods are pretty dead, though I suppose I ought to know that however, to be somewhat more philosophical in the matter, if atheism means simply not being a theist, then of course I'm an atheist.

[Letter to Max Otto]

The atheist view is correspondingly life-affirming and life-enhancing, while at the same time never being tainted with self-delusion, wishful thinking, or the whingeing self-pity of those who feel that life owes them something.

Atheism, a religion dedicated to its own sense of smug superiority.