yidquotes:

Many foolish beliefs that people once held, such as forms of idol worship that demanded child sacrifice, etc., have disappeared. But, as of yet, the foolish belief in the pursuit of war has not disappeared…. What great thinkers they [scientists who design certain weapons] must be, what ingenuity they must possess to invent amazing weapons that kill thousands of people at once! Is there any greater foolishness than this – to murder so many people for nothing?

Rabbi Nachman of Breslov