Man is a moral creature. The moral sense is so deeply rooted in human beings that no thief, no murderer has ever asked the abrogation of the penalties against theft and murder. All the laws that have ruled human organization in the past and rule them at present are based on the moral sense: on what is right and wrong. And no religion, no legislature has ever deemed it necessary to define right and wrong, because no one has any doubt as to the meaning of these terms. Only the worshippers of the pseudoscience of modern times regard morality and immorality, justice and injustice, good and evil, as anti-scientific concepts, since it is not possible to reproduce them in a laboratory. … The reasonings of the vivisectionists are unscientific because they don't take into account the intangible realities of life. The moral law is one such intangible reality: And it is the incomprehension of this reality that marks the inescapable failure of experimental science when applied to living beings, with its inevitable sequence of tragic errors.
Hans Ruesch