"If you have no enemies,
you are apt to be
in the same predicament
in regard to friends."
-Elbert Hubbard

"The greatest concerns of men are these,
to make him who is an enemy a friend,
to make him who is wicked righteous,
and to make him who is ignorant learned."
-Zend-Avesta

"If we could read
the secret history of our enemies,
we should find in each man's life
sorrow and suffering enough
to disarm all hostility."
-Henry Wadsworth Longfellow

"Everyone needs a warm personal enemy
or two to keep him free from rust
in the movable parts of his mind."
-Gene Fowler

"Nothing would more contribute
to make a man wise
than to have always
an enemy in his view."
-Lord Halifax

"One very important ingredient
of success is a good, wide-awake,
persistent, tireless enemy."
-Frank B. Shutts

"In order to have an enemy,
one must be somebody. One must be a force
before he can be resisted by another force.
A malicious enemy
is better than a clumsy friend."
-Anne Sophie Swetchine