but that which uses all the other faculties as its instruments and servants. In truth it does not belong to the visible world, but to the invisible, and has come into this world as a traveller visits a foreign country for the sake of merchandise, and will presently return to its native land. It is the knowledge of this entity and its attributes which is the key to the knowledge of God.
Some idea of the reality of the heart, or spirit, may be obtained by a man closing his eyes and forgetting everything around except his individuality. He will thus also obtain a glimpse of the unending nature of that individuality. Too close inquiry, however, into the essence of spirit is forbidden by the Law. In the Koran it is written: "They will question thee concerning the spirit. Say: 'The Spirit comes by the command of my Lord.'" Thus much is known of it that it is an indivisible essence belonging to the world of decrees, and that it is not from everlasting, but created. An exact philosophical knowledge of the spirit is not a necessary preliminary to walking in the path of religion, but comes rather as the result of self-discipline and perseverance in that path, as it is said in the Koran: "Those who strive in our way, verily we will guide them to the right paths."
For the carrying on of this spiritual warfare by which the knowledge of oneself and of God is to be obtained, the body may be figured as a