It is said in the book of "Zohar" that all the worlds – Upper and lower, and everything that exists in them, are created only for the sake of man. All these levels are created for one purpose only - to bring all the souls to perfection; to the adhesion with the Creator at the level that is missing in them from the moment of the Thought of Creation.
The profoundness of the wisdom in the holy Book of Zohar is enclosed and caged behind a thousand locks, and our human tongue too poor to provide us with sufficient, reliable expressions to interpret one thing in this book to its end. Also, the interpretation that I have made is but a ladder to help the examiner rise to the height of things and examine the words of the book itself.