We have learned the manner of resistance from Hossein Ibn Ali [peace be upon him]

The fighter and struggler for the sake of God who stood against the world so innocently and his blood was shed and his household were held captive, defeated his enemy in every manner. This is a lesson for all nations. Thus the great leaders of the contemporary world- even those who are not Muslim- are narrated to have said: “We have learned the manner of resistance from Hossein Ibn Ali [peace be upon him].”
The Leader of Islamic Ummah and Oppressed People Imam Sayyed Ali Khamenei, 1/7/1992