The book of Zohar – a complex and profound book – contains the wisdom of Kabbalah in its entirety. It tells us of the complete path a person must go through from the moment his souls finds its place in a corporeal body; the time he lives along with it in the corporeal world, and how he ends his life, continues to exist as a soul without a body, and how it descends to this world again. Thus, many life cycles go by and we call them “reincarnations” of the soul.
The Zohar says that apart from our world, there is another world – much more spacious – that only Kabbalists can feel, or the souls that exist outside the corporeal body. Man must come to a situation where he lives in both worlds simultaneously. It gives him the ability to be master of his own fate, to plan his future and not be influenced by the life and death of his biological body, but rather to be directly connected with his soul.
Courtesy of http://www.youtube.com/watch?v=k90Xc_KhdBA