A43.2

From a biological point of view, the heart is the part of the human body with the  well-known physiological functionality and this is the fully material being without any spiritual essence. But the soul is the fully spiritual being that expresses the spiritual, moral qualities of man. The mind is the material, but also the substance that extends beyond the complexity of its functionality, which extends to the issues of spirituality. So if the quality of the soul is entirely from mind, then what is the need for the soul? This is due to the purity and truth of the mind. The concept of the soul is used to avoid the negative character of the mind, which is to be understood as the unity between the mind that calls for the truth (logic) and the soul (with the exception of a glorious soul) that calls people to err. In this sense, the concept of the soul is the synonym of the concept of the spirit.