- To distinguish true believers – It is narrated from Imam Sadeq (AS) who said: The occultation of Imam Mahdi (AJ) will be long in order that the truth becomes clear, and the belief is cleansed from darkness, and any Shia with impure character who is feared to find out about the massive and secure facilities available to Imam Mahdi (AJ), to behave hypocritically; and in this way the pure is separated from the impure .
- Preparation of the situation of the world and preparing the basis of acceptance by people – One of the reasons for the occultation is to prepare humanity for re-appearance of Imam Mahdi (AJ). Because his methods of governing is based on realities and considering the rights of people, rejecting oppression, establishing justice and administering all Islamic decrees without any possible negligence. It is narrated when Imam Mahdi (AJ) re-appears; science, culture and education become so widespread that according to Imam Baqer (AS): At the time of Imam Mahdi’s (AJ) uprising, Allah (SWT) will spread special Divine Mercy/Grace on the heads of people, and in this way their wisdom and thoughts become complete .
 Beharul Anwaar, Vol. 51, Page 222.
 Osul Kafi, Vol. 1, Page 29.