most just man can neither defend the innocent nor detect
the guilty, unless he knows how to be just; and this knowl- [10]
edge demands our time and attention.
The mental stages of crime, which seem to belong to
the latter days, are strictly classified in metaphysics as
some of the many features and forms of what is properly
denominated, in extreme cases, moral idiocy. I visited [15]
in his cell the assassin of President Garfield, and found
him in the mental state called moral idiocy. He had no
sense of his crime; but regarded his act as one of simple