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

قَرينُ الشَّهوَةِ مَريضُ النّفسِ، مَعلولُ العَقلِ.

'The associate of the desire has a sick soul and an ill intellect.'

Source: Ghurar al-Hikam, no. 2790