meaning or value in life needs to refer to something outside our lives, which are physical-, material-based experiencesWhy? I would ask Klinghoffer, just because you think that way, why do you assume that your thinking applies to all others? He finishes with this:
If your intellect or your philosophy tells you that a certain action is right or wrong, what makes that moral judgment authoritative? What compels you to obey it? Your conscience? But why obey that, when it's merely part of the same physical system that gave rise to you and your body (which of course are the same thing)?This is basically another variant of the old how can atheists have morals argument. That's already been addressed by many people. But I will note that even most religious people interpret the moral code and rules of their religion. They don't usually follow it blindly without any thought. In other words, they use their brain and their instincts to determine right and wrong -- just as atheists.