Sam Harris: Why Religion Must End

Worth a thought, and perhaps a full read. 

All we have is human conversation to do this with. Either you can be held hostage by the human conversation that occurred 2,000 years ago and has been enshrined in these books, or you can be open to the human conversation of the 21st century. And if there's something good in those books, then it is admissible in the 21st century conversation on morality.