 Due cultivation of the mind involves filling it with sound opinion regarding our duty, learning to judge well the objects which commonly stimulate our desires, and acquiring rational control of our passions. It also involves our learning to act on the knowledge that, as regards our humanity, we are neither superior nor inferior to other people. Finally, a person with a well cultivated mind is aware of how little he knows of what the future holds, and consequently is neither arrogant at his present happy circumstances nor excessively anxious about ills that might yet assail him.