A treatise on knowing the rational soul and its conditions

This is a treatise written by the inimitable scholar Ibn Sina in psychology, and it consists of three chapters: Chapter One: On proving that the essence of the soul is different from the essence of the body. Chapter Two: On the survival of the soul after the annihilation of the body. Chapter Three: On the levels of happiness and misery of souls after the soul separates from the body. Then he added a conclusion to it in which he dealt with the three worlds, which are the world of the mind, t...