Hawzah News Agency – The commander of the faithful, Imam Ali peace be upon him says:

كلُّ شي‏ءٍ يَحتاجُ إلى العقلِ، والعقلُ يَحتاجُ إلَى الأدبِ.

'Everything needs the mind, and the mind needs good manners.'

Source: Ghurar al-Hikam, no. 6911