But the reality is that I have the conscious power to choose in how and when (and if) to satisfy my wants.  This is what makes us human and distinguishes us from the predictable pre programmed behaviour of animals.  So I will continue to employ my God given power to choose to witness to the reality of God's existence.  There is nothing incoherent about the power of our souls to consciously choose our thoughts, words and actions.  It is only incoherent if you try to make it comply with the endless physical chains of cause and effect