The subject of happiness has always been a focus of theologian philosophers. Happiness is a concept which Muslim philosophers have investigated in different ways. In this connection, Mulla Sadra has explained happiness based on an ontological approach of his Transcendental Wisdom to define human happiness as the promotion of and achievement of a good life. He establishes a concomitant relationship between pleasure and happiness on the one hand. On the other hand, the perception of pleasure in happiness semantics found his philosophical efforts to interpret this very important issue in the perfectible course of levels of reason, with the perfectibility actualizing from a potentially materialistic body into an immaterial soul. According to this approach and a new perspective on the agency by foreknowledge based on Sadra’s theological knowledge, an explanation of a happy man’s position can be provided wherein man achieves the acquired reason and unites with the active intellect originating from the agency by foreknowledge to mediate between the creation of the universe and manipulation with it; hence, the role of the happy man can be reasonably explained by a well-established philosophical basis.
