Reception date: 1400/3/2 Acceptance date: 1400/9/27 64 AYENEH MA'REFAT, No.70/ Spring 2022 _____________________________________________ ___ initiatives in explaining the truth of Badā', especially his mystical view of it, are unique. Using Sadra's philosophical and mystical principles, he has managed to provide a novel and new explanation of the truth of Badā', its relationship with the knowledge and will of God and divine destiny, and the way it is expounded through the knowledge and narratives of the Ma'suumin (P.B.U.T.). Adopting his viewpoint, the present paper is an attempt to explain the truth of Badā' and to analyze its relationship with Knowledge, will and divine destiny, and the knowledge and infallibility of the Ma'suumin (P.B.U.T.).