Before the victory of the Revolution, we knew like our palm that one of the stages is the stage of fighting against terrorism. We knew that the enemy will use every means for extermination. This is one of the efficient means that has a high-performance ratio. The revolution in other countries caused their political system was destroyed and the regime was changed; we had seen how they have launched terrorism, what do the explosions? It is not possible that Iran is an exception. We knew, despite of the left and right groups, whether they sit aside and watch the implementation of Islamic law, is it possible that they do not achieve anything? But what we had not thought - at least I had not thought- the spread scale of the terrorism.
The statements of his eminence Grand Ayatollah Mousavi Ardebili in Friday prayer Sermons, Friday, November 12, 1981