Your professors will give you some fine books to read, and they’ll probably help you understand them. What they won’t do, for reasons that perplex me, is to ask you if the books contain truths you could live your lives by. When you read Plato, you’ll probably learn about his metaphysics and his politics and his way of conceiving the soul. But no one will ask you if his ideas are good enough to believe in. No one will ask you, in the words of Emerson’s disciple William James, what their “cash value” might be. No one will suggest that you might use Plato as your bible for a week or a year or longer. No one, in short, will ask you to use Plato to help you change your life.
That will be up to you. You must put the question of Plato to yourself. You must ask whether reason should always rule the passions, philosophers should always rule the state, and poets should inevitably be banished from a just commonwealth. You have to ask yourself if wildly expressive music (rock and rap and the rest) deranges the soul in ways that are destructive to its health. You must inquire of yourself if balanced calm is the most desirable human state.
Read the whole essay here.