Thomas Jefferson said something about the purpose of government that could/should be adapted to govern bioethics.
I would like to see the following motto be adopted for the study and practice of bioethics at every university and hospital then posted on all bioethicists' office walls:
The care and protection of human life, and not its destruction, is the only legitimate role of bioethics. 
Mark Davis Pickup
 The quote attributed to Thomas Jefferson: "The care of human life and happiness, and not its destruction, is the first and only object of good government."