The Zohar, Chapter ”Lech Lecha (Go Forth),” Items 146-150: He said, “When a man goes to sleep on his bed, his soul departs from him and goes up, as it is written, ‘At night my soul longs for You.’”…
Afterwards, she walks and roams and rises according to her degree.
That Nefesh that was rewarded with rising appears before the King and adheres with a desire to be seen, a sublime craving to see the pleasantness of the King and to visit His palace. This is a man who always has a share in the next world.
What is the soul (Nefesh)? When I desire to unite with the others and feel how through this aspiration I connect with similar desires of the others, the place of our oneness and unity is called “Nefesh” in relation to me. Everyone may feel it differently, but for me Nefesh is the first spiritual step. If I can later strengthen this connection despite my growing egoism and obstacles, I can attain the next spiritual degrees: Ruach, Neshama, Haya, and Yechida. But the place of my very first contact, my desire for unity to occur, is called Nefesh.
I have to create a place for all of our desires to come together! And when everybody is there (and so am I), when I have connected them with my effort (and they have given me the opportunity to enter and join them), there, in the place of my exertion and my oneness with all the others, I will finally undergo all the spiritual states that The Zohar tells us about.
All I need is to desire this connection and feel as if I’m already in it, which will indicate my entering the state of Nefesh. The Zohar tells me about what happens next, in this oneness. There is only one relationship which experiences ups and downs, various adventures, and spiritual states. The Zohar doesn’t discuss anything else. As a matter of fact, The Zohar talks solely about the spiritual world since spirituality can be found only in our oneness.
From the 2nd part of the Daily Kabbalah Lesson 7/27/10, The Zohar