Humans are the only beings among the creatures that can be upgraded to the higher level. During the spiritual descending, he has reached the lowest level of existence, which is the world, and he must once again travel through this path in a spiritual ascending form; with the difference at this time, with the help of reason and free will, he can determine the degree and quality of his real afterlife. Among the free wills acts of humans in this world are religious acts and ethics acts. This research examines the ontological role of these two types of human volitional actions base on his afterlife identity from the perspective of Allameh Tabataba’i.

The role of the religious act in the spiritual ascendance journey of a human is to make him aware of the worlds after this world (afterlife), and as a result of the repetition of the religious act, the nature of human becomes compatible with the worlds after this world. Also, the role of the ethics act is to make soul to have total control on the virtuous ethics. Ethics norms and religious duties are both cast in the form of beliefs that act as a mediator between human and his action, and acting in accordance with these beliefs leads to the blossoming of truths in the heart of human, which is the life of man in the worlds after death. Human existence is ambiguous and consists of identical worlds. Ethics action can actualize some of the inner levels of human, but the ultimate happiness of human, which consists of satisfying all the inner worlds, cannot be realized except with monotheistic belief. Therefore, independent of morality from religion can bring a person to absolute happiness, but absolute happiness depends on a certain level of servitude. The effect of the religious act on the afterlife identity of a person is different depending on the individual's level of monotheistic belief. The best and fastest way to reach the level of knowing the Almighty God (monotheism) is the knowing of self; because when a person stand in need through his essence, then he finds the self-sufficient in essence, which is God.

KEYWORDS: Ontology of action, credit affairs, ethics, Shari’a, life after death, Allameh Tabataba’