though I do not forget that the thieving must be for the good of friends
and the harm of enemies. And still there arises another question: Are
friends to be interpreted as real or seeming; enemies as real or seeming?
And are our friends to be only the good, and our enemies to be the evil?
The answer is, that we must do good to our seeming and real good friends,
and evil to our seeming and real evil enemies--good to the good, evil to
the evil. But ought we to render evil for evil at all, when to do so will
only make men more evil? Can justice produce injustice any more than the
art of horsemanship can make bad horsemen, or heat produce cold? The final
conclusion is, that no sage or poet ever said that the just return evil for
evil; this was a maxim of some rich and mighty man, Periander, Perdiccas,
or Ismenias the Theban (about B.C. 398-381)...

Thus the first stage of aphoristic or unconscious morality is shown to be
inadequate to the wants of the age; the authority of the poets is set
aside, and through the winding mazes of dialectic we make an approach to
the Christian precept of forgiveness of injuries. Similar words are
applied by the Persian mystic poet to the Divine being when the questioning
spirit is stirred within him:--'If because I do evil, Thou punishest me by
evil, what is the difference between Thee and me?' In this both Plato and
Kheyam rise above the level of many Christian (?) theologians. The first
definition of justice easily passes into the second; for the simple words
'to speak the truth and pay your debts' is substituted the more abstract
'to do good to your friends and harm to your enemies.' Either of these
explanations gives a sufficient rule of life for plain men, but they both
fall short of the precision of philosophy. We may note in passing the
antiquity of casuistry, which not only arises out of the conflict of
established principles in particular cases, but also out of the effort to
attain them, and is prior as well as posterior to our fundamental notions
of morality. The 'interrogation' of moral ideas; the appeal to the