Possible Clues:

• Wise old Greek squad, running away
• “Allegory of the Cave” originator
• Philosopher taught by Socrates
• Principals prohibit learning about teachings of this idealist
• Philosopher's occupational therapy: mountain climbing
• Philosopher and squad, not working
• Philosopher with old books having mountain to climb
• Philosopher inserting line in page, odd selection for author
• Philosopher's books mount up
• 'Apologia Socratis' author