Richard Wanley: The Biblical injunction “Thou shalt not kill” is one that requires qualification in view of our broader knowledge of impulses behind homicide. The various legal categories such as first and second degree murder, the various degrees of homicide, manslaughter, are civilized recognitions of impulses of various degrees of culpability. The man who kills in self defense, for instance, must not be judged by the same standards applied to the man who kills for gain.