Understand that the human intellect is the greatest tool that we yet know and that your rationale is important. Understand that the presence or absence of a higher power has no effect on your moral code, unless he or she were to provide a code that is superior to one that you can deduce on your own. In this case, a moral and logical atheist would accept such a code without question. However, despite its godly origin, such an atheist would still recognize the value in questioning this divine moral code in order to potentially obtain even greater moral right. If such as divine code is perfect, then questioning it only serves to support its greatness and make it stronger. As such, one should never fear questioning a moral code.

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Note that morality does not come from religion, but from communities who interpret religion. If a modern human were to stone to death an adolescent for not honoring his/her father and mother, we would certainly think him/her immoral. Yet, these are the prescribed punishments for such acts, according to Abrahamic texts found in the Old Testament. Since modern humans do not follow their religious texts to the letter, they must have some method for determining which prescriptions to follow and which to discard, which is ultimately where our morals come from. Ask yourself -- is this action "good" because God tells us to do it, or is it simply a good thing to do. If the action is only good because God says so, then morality is nothing more than a checklist, and there are likely few Christians who believe that murder is moral just because someone talked back to their father.