The human watchdogs must be philosophers or lovers of learning which will make them gentle.
 Plato, The Republic. copy citation

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Author Plato
Source The Republic
Topic learning philosopher
Date
Language English
Reference
Note Translated by Benjamin Jowett
Weblink http://www.gutenberg.org/files/1497/1497-h/1497-h.htm

Context

“For dogs are gentle to friends and fierce to strangers. Your dog is a philosopher who judges by the rule of knowing or not knowing; and philosophy, whether in man or beast, is the parent of gentleness. The human watchdogs must be philosophers or lovers of learning which will make them gentle. And how are they to be learned without education? But what shall their education be? Is any better than the old-fashioned sort which is comprehended under the name of music and gymnastic? Music includes literature, and literature is of two kinds, true and false.” source