Axis, Cycle and Heart
In Sefer Yetzirah, the ‘King’ of Space is said to be the Axis (Teli תלי), the imaginary line that the universe revolves upon. This is represented in this picture by the blue ‘line’ in this picture.
The ‘King’ of Time is the Cycle (Galgal גלגל) because we relate to time as cyclical. This is represented by the red ‘circle’ in this picture.
The ‘King’ of Soul is the Heart (Lev לב) because of its central location in the body, and because the heart pumps blood to and from all the limbs of the body via blood vessels that branch out in fractal patterns like the one seen in this picture.
From the yellow Heart two branches emerge; and then from two to four; from four to eight; from eight to sixteen; and then from sixteen to thirty-two. The gematria (number value) of the Hebrew word Lev לב (Heart) is thirty-two. And Sefer Yetzirah is all about the Thirty-two Paths of Wisdom - Wisdom of the Heart - the Ten Sefirot of Nothingness and the Twenty-two Foundation letters.
In Sefer Yetzirah, the Ten Sefirot are presented as five dimensions. Soul (the human Mind/Body) is one dimension; Time is another dimension; and there are three dimensions of Space. These five dimensions are how the Endless and Eternal God (Ein Sof) relates to us on our own level.
From Sefer Yetzirah:
Ten Sefirot of Nothingness, their measure is Ten which have no end -
A depth of Good and a depth of Evil (Keter and Malchut) - (Soul);
A depth of Past and a depth of Future (Chochmah and Binah) - (Time);
A depth of South and a depth of North (Chesed and Gevurah);
A depth of East and a depth of West (Tiferet and Yesod);
A depth of Above and depth of Below (Netzah and Hod) - (Space);
And the Singular Master, God Faithful King rules in all of them
from His holy abode for ever and ever.
True witnesses in the Space, Time, and Soul
He set them in the Axis, the Cycle, and the Heart.
The Axis in Space is like a king on his throne.
The Cycle in Time is like a king in the province.
The Heart in Soul is like a king in war.