13

“Declare your jihad on thirteen enemies you cannot see – Egoism, Arrogance, Conceit, Selfishness, Greed, Lust, Intolerance, Anger, Lying, Cheating, Gossiping and Slandering. If you can master and destroy them, then you will be ready to fight the enemy you can see.”
Al-Ghazali
Persian Muslim theologian, jurist, philosopher, and mystic.
Born in Mashhad, Iran
September 27, 1057
Died September 27, 1110