DJW,
Perhaps I poorly worded a few things.
But atheists do in fact beleive that we are just chemicals and copying mistakes. You don't worry about if your soda cans in your pantry find purpose do you? That is the kind of purpose I'm talking about.
Like I said The Marquis de Sade found happiness in administering pain to women. If the happiness he experienced was greater than the unhappiness of his victims, then the net gain makes it moral if happiness is the standard.
People can choose their own purpose! That is part of the great uplifting message of atheist naturalism!
Really? So our purpose is subjective? What if someone chooses a purpose that requires them to murder you? That logic doesn't really work does it?
The Christian purpose is to love God and to love your neighbor... even your enemies. I can make sense of that because it is rooted in God's character.
I cannot make sense of soda cans and broken data codes needing purpose.