Note: in writing this I'll be making some generalizations and doing some guesswork - I cannot be sure whether atheists, much less christians, actually think the way that I propose they do. So if you think that the following doesn't apply to you, feel free to correct me.
Many christians propose that without an absolute authority to define good and evil, morality isn't possible or at least cannot be trusted - that atheists are only constrained by laws and if it weren't for those, we should be going on killing sprees all the time.
This is, in my opinion, incorrect, in that it understands morality as an exclusively rational thing. It supposes that ethical decisions are made by consulting checklists and counting reasons for and against. This, however, isn't how we make our moral decisions at all. When faced with a certain situation (for example someone killing someone else for no apparent reason), a christian doesn't think to the ten commandments, check whether any of these apply and only then come to a rational conclusion, that the murder being commited is wrong. Instead, they immeadiately perceive the murder to be wrong, because they have a sense of right and wrong, because they have a conscience. Conscience might be a spiritual thing or it might be natural (although it isn't completely analogous, it's still close to what Freud called the super-ego), but in this case that's pretty irrelevant. The point is, the christian witnessing a murder will see it as wrong not because of the ten commandments but because of their moral sense. Indeed, I would very much question the moral integrity of anybody who didn't have such a moral sense and would act morally only after checking with a list of laws or commandments.
And the point is, the moral sense is in no way exclusive to christians or religious people in general. Again, for christians, conscience is a spiritual thing - but I don't think God only bestowed it on those who accept him. For atheists (at least myself) it's an evolutionary advantage which is likewise universal.
Now, one's moral sense might be influenced by a number of things. For many christians it's influenced by the Bible, for others by the specific teachings of their church or religion. In every case it's certainly strongly influenced by the society (the ancient societies honestly didn't see anything wrong with slavery, nor did many Americans in the previous centuries). The only difference between christian and atheist morality is thus that the christian's moral sense is influenced by one additional factor, which is, in my opinion, not the dominant one anyway.
True, I have only focused on simple moral decisions and not on complex ones such as abortion (on which we have our differences). However, if you look at abortion, you will likewise see the atheist (let's assume they're pro-choice, though there are probably some who aren't) making a moral decision based on their sense of right and wrong. The only difference is, they will emphasize a certain aspect (the woman's right to her body) over the other. You might not agree with it, but it's still an ethical decision which the atheist is able to make because he is not amoral any more than a christian is.
Many christians propose that without an absolute authority to define good and evil, morality isn't possible or at least cannot be trusted - that atheists are only constrained by laws and if it weren't for those, we should be going on killing sprees all the time.
This is, in my opinion, incorrect, in that it understands morality as an exclusively rational thing. It supposes that ethical decisions are made by consulting checklists and counting reasons for and against. This, however, isn't how we make our moral decisions at all. When faced with a certain situation (for example someone killing someone else for no apparent reason), a christian doesn't think to the ten commandments, check whether any of these apply and only then come to a rational conclusion, that the murder being commited is wrong. Instead, they immeadiately perceive the murder to be wrong, because they have a sense of right and wrong, because they have a conscience. Conscience might be a spiritual thing or it might be natural (although it isn't completely analogous, it's still close to what Freud called the super-ego), but in this case that's pretty irrelevant. The point is, the christian witnessing a murder will see it as wrong not because of the ten commandments but because of their moral sense. Indeed, I would very much question the moral integrity of anybody who didn't have such a moral sense and would act morally only after checking with a list of laws or commandments.
And the point is, the moral sense is in no way exclusive to christians or religious people in general. Again, for christians, conscience is a spiritual thing - but I don't think God only bestowed it on those who accept him. For atheists (at least myself) it's an evolutionary advantage which is likewise universal.
Now, one's moral sense might be influenced by a number of things. For many christians it's influenced by the Bible, for others by the specific teachings of their church or religion. In every case it's certainly strongly influenced by the society (the ancient societies honestly didn't see anything wrong with slavery, nor did many Americans in the previous centuries). The only difference between christian and atheist morality is thus that the christian's moral sense is influenced by one additional factor, which is, in my opinion, not the dominant one anyway.
True, I have only focused on simple moral decisions and not on complex ones such as abortion (on which we have our differences). However, if you look at abortion, you will likewise see the atheist (let's assume they're pro-choice, though there are probably some who aren't) making a moral decision based on their sense of right and wrong. The only difference is, they will emphasize a certain aspect (the woman's right to her body) over the other. You might not agree with it, but it's still an ethical decision which the atheist is able to make because he is not amoral any more than a christian is.