Many authentic sources say that Imam Baqir (a.s.) has said that Allah has never left the earth without an Imam who adds what has been diminished (by wrongdoers) and what has been wrongly added in the religion. Had He not done so, people would certainly remain in doubt all the time. Sulaiman Ja’fari once asked Imam Ridha (a.s.): Can the earth ever remain without a Hujjat? He replied: If it remains without an Imam ever for a split second it would certainly sink along with its inhabitants.