Read the (long) linked-to article from which the quote stems. Basically the point is that using violence to achieve a goal teaches the people involved that violence is an effective, legitimate way to achieve goals—and at some later point they will invariably have conflicting goals.
Read the (long) linked-to article from which the quote stems. Basically the point is that using violence to achieve a goal teaches the people involved that violence is an effective, legitimate way to achieve goals—and at some later point they will invariably have conflicting goals.
See also: Live by the sword, die by the sword.