More quotes by Plato

"Knowledge becomes evil if the aim be not virtuous."
"We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light."
"The price good men pay for indifference to public affairs is to be ruled by evil men."
"Knowledge is the food of the soul."
"Music is a moral law. It gives soul to the universe, wings to the mind, flight to the imagination, and charm and gaiety to life and to everything."