Tajdid
The notion of tajdid in the Islamic tradition can be traced back to the Prophet Muhammad, who said that "At the start of each century there will arise in this ummah (the Muslim community) those who will call for a religious renewal". Such people (mujaddids, or renewers of Islam), are believed to always come in the time when Muslim community departs from the true path defined by the Qur'an and sunnah (example of the Prophet). The task of the mujaddid, therefore, is to return Muslims to their basic sources (the Qur'an and sunnah), to clean Islam from all un-Godly elements, to present Islam and make it flourish more or less in its original pure form and spirit.