States of the soul

There is no philosopher who does not speak about the human soul, because it is the closest thing to us, and despite this closeness, it is very mysterious. Ibn Sina sought to understand the soul from the beginning of his youth, because "whoever knows himself, has known his Lord," as he told us in the treatise on mental powers that he wrote for Prince Nuh ibn Mansur. It was his first work, and although the Sheikh Al-Rais began his intellectual life with a treatise on the soul, he also concluded it forty years later with a small treatise on the human soul. During these years, he wrote many psychological messages, as well as the sixth chapter of "The Natural Sciences of Healing," which is the book "The Soul," considered the most comprehensive of his writings in this field. The evidence of the importance of Ibn Sina's book "The Soul" and its great influence in the medieval era is that it was translated into Latin and spread widely among European philosophers, as evidenced by the remaining manuscripts of it in European libraries to this day, totaling forty-five. European thought was influenced by it from the twelfth century until the seventeenth century, when Descartes appeared, who adopted Ibn Sina's proof for the existence of the soul.