Some atheism quotes I ran across just now...
They (the animals) do not make me sick discussing their duty to God. Walt Whitman.
I don't know if God exists, but it would be better for His reputation if He didn't. Jules Renard.
The equal toleration of all religions is the same thing as atheism. Pope Leo XIII.
The worst moment for the atheist is when he is really thankful and has nobody to thank. Dante Rosetti.
Atheism is fervid belief in disbelief. Laurence Peter.
I think of Atheism as a rejection of childish ignorance and fear, being an adult and accepting responsibility for your actions instead of asking forgiveness of an imaginary sky daddy or blaming an imaginary devil.
My personal favourite -
"Isn't it enough to see that a garden is beautiful without having to believe that there are fairies at the bottom of it too?" Douglas Adams.
Leo was a dick. I know they are were, and I rechecked to see, and yep he, Leo, was under Charlemagne.