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

إيّاكُم وغَلَبَةَ الشَّهَواتِ على‏ قُلوبِكُم؛ فإنَّ بِدايَتَها مَلَكَةٌ، ونِهايَتَها هَلَكَةٌ.

'Beware of having desires overcome your hearts, for their beginning is an enslavement and their end is ruin.'

Source: Ghurar al-Hikam, no. 2746