Definition of "protreptic" []

• Serving to instruct; didactic (adjective)
• A didactic speech, book etc (noun)

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• "The “protreptic” mode is that which convinces hearers, singly or in groups, to care about philosophical study as a means toward personal ethical development."
• "Plato's attempt to argue for the split between the intelligible and sensible world in Books VI and VII of the Republic may well be a protreptic directed at Archytas, who refused to separate numbers from things."
• "Book One, On the Pythagorean Life, has biographical aspects but is primarily a detailed description of and a protreptic for the Pythagorean way of life."