Imam al-Sadiq (AS) said, ‘Be on your guard that the extremists do not corrupt your youth, for verily the extremists are the most evil of Allahs creation for they belittle the Greatness of Allah, and falsely attribute divinity to the servants of Allah. By Allah, verily the extremists are worse than the Jews, the Christians, the Magians, and the polytheists. The extremist may return to us but we do not accept him again, whereas we do accept the negligent one when he tries to adhere to us. At this, he was asked, ‘How can that be O son of the Prophet (SAWA)? to which he replied, ‘Because the extremist has become accustomed to abandoning the prayer, the alms-tax, fasting, the pilgrimage, and cannot give up his habit and return to Allahs obedience ever again, whereas the negligent one, when he attains inner knowledge, begins to act and carry out acts of obedience.