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

تَولَّوْا مِن أنفسِكُم تأديبَها، واعدِلُوا بها عَن ضَراوةِ عاداتِها.

'Take charge of the discipline of your selves and shift them away from their rough habits.'

Source: Ghurar al-Hikam, no. 4522