Finally, a group of people, although in minority, is needed to form the core of the army of that great peacemaker.

Flowers should grow among this burning hell to be the beginning of a flower garden; saplings should be grown in this heath in order to promise the spring for the others.

Extraordinary aware, brave, compassionate, devoted persons should be trained for this act, although generations pass one after another for this purpose, until the main reservations appear and main members of the revolution are gathered, and it also need time.

But, who should take the responsibility of training these persons?

We should know that it is upon that great leader who executes such plan directly or indirectly (for explanation about this matter will be mentioned in the next discussion, god willing).

In Islamic narratives, one of the reasons of long occultation is said to be the issue of public examination and choosing the most competent one, which maybe points to this subject.

Explanation: Divine human examinations are not like the examination for measuring the abilities of the one who is being examined, but they are for training the talents and disclosing the abilities and separating the rows from each other.

And in other words, their goal is training, evolution or preparing; because unlimited knowledge of God about everything removes any kind of goal of measuring from the examinations.

Totally, this discussion cleared that why the occultation of Mahdi should be so long?