The prophetic mission created a scientific-gnostic change in the world that converted the insipid Greek philosophies, which were formulated with all … - Ruhollah Khomeini

If one permits an infidel to continue in his role as a corrupter of the earth, the infidel's moral suffering will be all the worse. If one kills the infidel, and this stops him from perpetrating his misdeeds, his death will be a blessing to him.

Islam proclaims monarchy and hereditary succession wrong and invalid. When Islam first appeared in Iran, the Byzantine Empire, Egypt, and the Yemen, the entire institution of monarchy was abolished. In the blessed letters that the Most Noble Messenger (peace and blessings be upon him) wrote to the Byzantine Emperor Heraclius and the Shahanshah of Iran, he called upon them to abandon the monarchical and imperial form of government, to cease compelling the servants of God to worship them with absolute obedience, and to permit men to worship God, Who has no partner and is the True Monarch. Monarchy and hereditary succession represent the same sinister, evil system of government that prompted the Lord of the Martyrs (Hussain bin Ali -- peace be upon him) to rise up in revolt and seek martyrdom in an effort to prevent its establishment. He revolted in repudiation of the hereditary succession of Yazid, to refuse it his recognition.

There is no room for play in Islam … It is deadly serious about everything.