What credentials, documents or whatever do you base your lifestyle on?I was a little surprised by this question as the answer is obviously that Atheists base their life chooses primarily on their knowledge and past experiences. For example killing is wrong for an Atheist not because it says so in a text, but because it robs someone of their life, hurts the people emotionally that knew that person when they where alive, is unnecessary as all problems can be worked out without resorting to violence and there are harsh consequences for the killer if the law finds out.
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In the several months that have past since I watched this episode of 30 Days I have noticed several Christians on YouTube ask this same question several times and Albert (who is an Atheist) has kindly put together quite a nice video responding to that question with what he believes.
I know Albert is right when he says that a minority of Atheists automatically regard theists as unintelligent, but it doesn't help that there are Christians willing to reinforce this viewpoint, like this woman that went on Wife Swap: