A comparative study of the distinction and unity of soul and spirit in meanings and applications from the perspective of Aristotle and Molla Sadra

One of the important issues related to man and the dimensions of his existence is the issue of distinction and unity of soul and spirit. In the field of Islamic interpretation and philosophy, the issue of the multiplicity of soul and spirit has often been less raised because they consider these two as a single truth and use the spirit instead of soul and the soul instead of spirit and state that the spirit and the soul has a single meaning and therefore it has been used together in the words of commentators and elders. But philosophically, they are two different concepts in the sense that the spirit is an essence that is inherently abstract but in material action; That is, it performs its actions through material means; Unlike the soul, which is inherently and currently single; That is, just as it is not matter itself, it does not need material tools in its actions and activities. It is worth mentioning that knowing this matter is important because the differences between thinkers in issues such as abstraction, non-abstraction of spirit, occurrence of spirit and movement of spirit have occurred due to the lack of separation of these two truths.