The great prophet of Islam in one hand carried the Koran and in the other a sword; the sword for crushing the traitors and the Koran for guidance. For those who could be guided, the Koran was their means of guidance, while as for those who could not be guided and were plotters, the sword descended on their heads. ...Islam is a religion of blood for the infidels but a religion of guidance for the other people.
Ayatollah Ruhollah Khomeini: Speech delivered at the Feyziyeh Theological School (August 24, 1979).