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Imam Reza (P.B.U.H) - the eight leader after the Prophet Muhammad- says:
one who sits in a meeting in which our doctrine is revived, his heart shall not die when the hearts die!

breif discription:
it is clearly inferred from the above sentence that the inevitable duty of followers of the prophet's household is to revive their programs in their meetings, knowing their doctrine, perceiving the spirit of their speeches, and becoming familiar with their instructions and that is to say their meeting should be a meeting of correction and readiness for life, not the meeting of amusement, asking requirements and thinking about personal troubles and desires and disregarding human, social and belief concerns. such a meeting will revive hearts and awaken the thoughts.
turasul-aiemma, page 443

قال الامام علی بن موسی الرضا علیه السلام

مَنْ جَلَسَ مَجْلِساً يُحْيى فيهِ اَمْرُنا لَمْ يَمُتْ قَلْبُهُ يَوْمَ تَمُوتُ الْقُلُوبُ
هر که در مجلسی بنشیند که امر ما در آن زنده می شود، قلبش نمیرد روزی که قلبها می میرند