The idea here is that the Tree emerged through a movement from above to below. It spiralled into existence, powered by the energies of emergence. As I understand it, it emerged from the more subtle to the dense.

There is also a two phase picture, one in which the tree existed in potential, and then in the next phase it manifested. There is also the concept of the ladder (known actually as Jacob's ladder) in which in progressed from the higher world (Atzilut) down to the lowest world (Assisyah) which is also the most dense.

Briefly, and I am not sure that what I have written below expresses this correctly, so it will need some updating, the idea is that it unfolds from Keter, down the central pillar to Malkhut. A kind of unrolling, falling down and sometimes up (as it says, "One descended, another ascended to be crowned above".) So bear with me, and hopefully I will express it more clearly soon.

The will of G-d is pushing the emergence down—down being into greater density. Force is always moving in a straight line (as a vector), so it is expressed down the central pillar. But the actual movement of the element(s) through the space is as spiral. Thus we see the emergence of the sefirot along the central pillar, with the outer sefirot emerging at the polarities of along the left and right side pillars.

Zohar: 5 sturdy leaves surround the rose and enshroud it, protecting it with the 13 attributes of mercy.

This is connected with , where there is a further explanation of the unfolding of the tree.

1. Balanced tree

=> perfect cube, made up of balanced, equilateral $\triangle$

=> within this, have all the balanced shapes of sacred geometry

=> all is at rest, perfect.

* * *

2. The emergence, a birth

=> The first emanation.
Emanation being emergence of the Divine in malchut.
The emergence of asymmetrical structure. Where good ≠ evil, i.e. there is no balance. ---
=> Rising to meet the beloved.
It starts with g = e but the reaching out, the desire (for union with the beloved) begins to "shape" the tree.

=> The first movement,
the first (upper) $\triangle$, the trigram.
The holy trinity.
The principle of creation, $s_1 \leftrightarrow s_2$,
The Word G-d spoke, $x = y$
The first sentence—subject, verb, predicate $\rightarrow y = f(x)$
There is now a beginning and an end

Emergence of ellipse, ovals.

Where G-d enters,
separation begins
Removal of nothing to make space for something
1st gaze is upward and outward

* * *

Now we can see the reflection in keter $\Rightarrow$ yesod
as is said: "as above, so below"
The energies that scintillate in the realms of the Divine manifest here in the realm of creation. The many splendoured dance above is reflected below. For each piece of creation there is a spark in the upper realm that is reflected here.

The analogy is that each whole number is surrounded by an infinite array of rational number, and an even greater amount of transcendental numbers. In fact, there are so many transcendental numbers, they completely drown out the existence of the numbers we are familiar with—to such an extent that it could be said that it is a miracle that we are able to identify any whole numbers at all. In other words, it is as if we were provided these whole numbers, almost to say that we were programmed to be able to identify them by some consciousness that had either created or was already aware of them.

* * *

* * *

Duality:

The dropping is also the first splitting.
The actualisation of the duality expressed in Malchut as Shechinah and מלכות, the masculine and feminine aspects of G-d. This splitting is a transformation of the 1^st idea.

So says Rabbi Chinoos: The crystal was formed in the words "It is good"