Religious belief has been known as the most important problem in religious studies. Therefore, various lines of thought have presented different ideas in the field. The author of Mawahib u-Rhman, seyyed Abdola‘la Sabzevari, relying on the sayings of the Prophet and pure Imams, has defined belief as acceptance by hearth, expressing orally and acting by the parts of body. He, thus, knows action as a part of the essence of belief. However, his view differs with that of Moatazelite and Khavarej knowing action as a part of belief. The reason why is that he knows belief to be of gradation. By the meaning is meant social and legal aspects only and, therefore, one cannot call it belief in true meaning. On his view, true belief is found only in the level of lawful duties.