http://libertytree.ca/quotes/Lucius.Annaeus.Seneca.Quote.87AA
"Arms observe no bounds; nor can the wrath of the sword, once drawn, be easily checked or stayed; war delights in blood."
-- Lucius Annaeus Seneca
(4 B.C.-A.D. 65) Roman Stoic philosopher, statesman, dramatist, "Seneca the Younger"
Source: Tragedies, Hercules Furens (The Madness of Hercules), lines 403-405; (Lycus).