Thou, O creature of God, wast created of the dust; therefore, be humble as the dust. Be not covetous, nor oppressive, nor headstrong. Thou art from the dust; be not like fire. When the terrible fire raised his head in pride, the dust prostrated itself in humility. And since the fire was arrogant and the dust was meek, from the former were the demons formed, and from the latter mankind.
– Shaykh Sa’adi Shirazi Rahimahu Llah