A human can be healthy without killing animals for food. Therefore if he eats meat he
participates in taking animal life merely for the sake of his appetite. -- Leo Tolstoy.
 
Whenever we cause suffering or death to any other being, we cause suffering to the Great Life Force. -- Shik Po Chih. 

"I would not eat if no one kills the animal," said the meat eater. "I would not kill if no one eats the animal," said the butcher. ["I would not breed these animals for consumption if no one orders them," said the big business executive.]

http://www.vegecyber.com/others/about_vegetarianism.shtml