Once I said to a dear Christian friend: “Suppose there really is no God, and suppose I had it within my power to show you this truth. Would you want me to do it?” She took the question seriously and finally responded, “No; that would be very painful to me.” Question: suppose I did know there is no God and that I did have that power. Would I have the right to show her that painful truth anyway? Would I have the duty to do so? Or would it depend further considerations?