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

عَبدُ الشَّهوَةِ أذَلُّ مِن عَبدِالرِّقِّ.

'The slave of his own desire is more humiliated than an owned slave.'

Source: Ghurar al-Hikam, no. 6298