KNOWING HADRAT MAHDI (May our soul be sacrifice for him)

It is written in the website of “Saeed Sadiqi” as follow:
Hadrat Ayatollah Mujtahidi Sistani in the introduction of his valuable “Sahifah Mahdiyyah” has written:
Hadrat Imam Husain (peace be upon him) in a spiritual exploration told one of the scholars from Qom:  
Our Mahdi (may Almighty Allah hasten his relief) is oppressed in his own time, then will you be able to deliver lectures and write something about that Hadrat because in reality what ever is said concerning the personality of this Hadrat is like such is said concerning the entire infallibles, as the entire infallibles are from one infallibility, guidance and Imamate; meanwhile for the fact that this time is the period of al-Mahdi his issue deserve to be discuss.
In a nutshell he said: I once again re-emphasize that you should make a lot of lectures and writings concerning our Mahdi because his is oppressed.
In this respect every night you should supplicate for the reappearance of Hadrat Mahdi (may Almighty Allah hasten his relief) which is the inauguration key of works.
O’ Allah hasten the reappearance of your guide.
Reference 1: from the website of Saeed Sadiqi    
Reference 2: Cultural group of the waiters of Mahdi (may Almighty Allah hasten his honorable reappearance).