Amir al-mu'minin, peace be upon him, said: Knowledge is a venerable estate; good manners are new dresses; and thinking is clear mirror.
وَ قَالَ ( عليه السلام): الْعِلْمُ وِرَاثَةٌ كَرِيمَةٌ وَ الْآدَابُ حُلَلٌ مُجَدَّدَةٌ وَ الْفِكْرُ مِرْآةٌ صَافِيَةٌ.