مَرْوَانَ بْنِ مُسْلِمٍ عَنْ اَبِي عَبْدِ اللهِؑ قَالَ الْاِمَامُ عَلَمٌ بَيْنَ اللهِ عَزَّ وَ جَلَّ وَ بَيْنَ خَلْقِهِ فَمَنْ عَرَفَهُ كَانَ مُؤْمِناً وَ مَنْ اَنْكَرَهُ كَانَ كَافِراً
Marwan Ibn Muslim narrates from Imam Abu Abdillah al-Sadeq (peace be upon him), “An Imam is a standard between Allah – Mighty and Majestic be He – and His creatures. Whoever recognizes him is a believer and whoever denies him is a disbeliever.”
Allah has created man and made a religion for him. But without a divine Imam, this religion cannot be followed. Just as one cannot get proper treatment without a proper doctor and a house cannot be built without a proper engineer. One who recognizes him is a believer is quite logical because a person who is a patient, if he does not go to a qualified doctor, his sickness will become worse. If he goes to a qualified doctor, he will get proper treatment and will be cured of his illness. The same applies for the role of engineers and architects in building of houses.
1. Behaar al-Anwaar, vol. 23, p. 88, H. 32
2. Kamaal al-Deen