The Book of Zohar describes only our inner qualities; this is why Kabbalah is called the inner part of the Torah. It only seems to us that the world develops and expands outward, but this is not true. It is our egoism that causes us to feel a spatial dispersion.
This outward perception is opposite to the correct focus and to the spiritual root. After all, the root is a thin line (Kav Dak), which passes through all of reality at its deepest level. Therefore, we have to concentrate within, focusing on our desires and qualities. We will then reveal a more internal degree.
In the science of Kabbalah we learn that our whole ascent lies in continually shifting to a more internal Partzuf. First the conception (Ibur – embryo) in the Partzuf NeHY occurs; then the inner Partzuf HaGaT is built inside, which is the suckling stage (Yenika). Then an even more internal Partzuf of HaBaD is built – the stage of adulthood (Mochin).
Thus, we complete one Partzuf – one of 125 degrees to complete correction. What now? Now a new Partzuf begins, which is a new degree of correction, like the next, higher floor, and it also consists of the same three stages – conception (or embryo), suckling, and adulthood.
In this manner, we constantly delve deeper and deeper until we reach the line of Infinity and suckle from this line. This is why one’s search should always be directed inside.