In truth it does not belong to the visible world...

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 eves 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 kingdom, the soul as its king, and the different senses and faculties as constituting an army.

Reason may be called the vizier, or prime minister, passion the revenue-collector, and anger the police-officer. Under the guise of collecting revenue, passion is continually prone to plunder on its own account, while resentment is always inclined to harshness and extreme severity. Both of these, the revenue-collector and the police-officer, have to be kept in due subordination to the king, but not killed or expelled, as they have their own proper functions to fulfil.

But if passion and resentment master reason, the ruin of the soul infallibly ensues. A soul which allows its lower faculties to dominate the higher is as one who should hand over an angel to the power of a dog or a Mussalman to the tyranny of an unbeliever.

The cultivation of demonic, animal, or angelic qualities results in the production of corresponding characters, which in the Day of Judgment will be manifested in visible shapes, the sensual appearing as swine, the ferocious as dogs and wolves, and the pure as angels.