Belief in the walāya and the necessity of its continuity at all times has been considered as one of the principal and significant doctrines of Muslims in general and Shi’ā in particular without which religion is meaningless. The present paper aims to depict a reasonable framework based on the philosophical basis of Mulla Sadra in order to explain the above mentioned doctrine. Imams are exemplars of walāya and they were responsible to lead creatures after the prophecy. Relying on the opinions and works of Mulla Sadra, the author attempts to explain the distinguished place of the doctrine of walāya, the possibility of achieving it and continuous human need for it.
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