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Use gentle methods to get whatever good you can from priests and monks who are slaves, as well as from merchants and captives. Resort to severe measures only in extreme cases, for fear lest the hardship they are already enduring in their state of captivity, joined to the strictness you might want to exercise in virtue of your authority, drive them to despair. . . . It is not light they need, but strength, and strength permeates through the external balm of words and good example.