In this book, Abu Hamid Al-Ghazali deals with the paths of knowing the soul to knowing the truth, glory be to Him, and he mentioned what the proofs lead to regarding the condition of the human soul, and the essence of what comprehensive research has found regarding its matter and its being separate from the attributes of bodies, knowing its powers and forces, and knowing its occurrence, survival, happiness, and misery. After parting, in a way that reveals the veil and lifts the veil, and indicates stored secrets and hidden knowledge, which are held dear to those who do not know it. He concluded the chapters of his book with self-knowledge, which is the path to knowing the truth, glory be to Him. All sciences are introductions and means of knowing the First, the True, Glory be to Him. So whoever knows himself knows his Lord, knows His attributes and actions, knows the levels of the world, its creations and components, knows the angels and their ranks, knows the message and prophecy and the manner of revelation, the manner of miracles and news of the unseen, and knows the Hereafter and its happiness and misery and its parts and pleasure. The joy in it.