The letter yud is a small suspended point, the only letter that does not reach the ground. Subsequent to the initial tzimtzum, (the contraction of HaShem's Infinite light in order to make place for Creation,) there remained within the empty void a single point. The secret of this point is for the Infinite to contain finite events within itself and express them to external reality.

Finite manifestation begins from a zero-dimensional point, thereafter developing into a one-dimensional line and two-dimensional surface. This is demonstrated in the full spelling of the letter yud (yud-vav-dalet):

The spelling of the letter yud unfolds into dimensions

yud is a point, 0 dimensions

vav is a line, 1 dimension

dalet is two lines, representing a flat surface, 2 dimensions

if you add the numerical values of these letters, four + six + ten,

4 + 6 + 10 = 20

it equals twenty, the letter kuf . Kuf is a three sided figure, representing a three dimensional space.

The two letters of the full spelling of kuf, kuf peh (), are the initials for two Hebrew words: koach meaning potential and poel meaning actual. Thus, the kuf hints at the power within the spiritual realm of the potential to manifest itself in the physical realm.

Now, if you add the numeric values of + + +, it equals 40, the numeric equivalent to the letter mem .

20 + 10 + 6 + 4 = 40

Mem has four sides, implying the three dimensions of physical space and the fourth of time, which allows interactions to occur within that space.

The shape of the letter mem can be viewed as a combination of the letter vav with the letter kaf, where kaf is the 3 dimensional space, and vav, being the number six, stands for the six days of creation, implying the dimension of time.

time + space = spacetime

If you add the numeric values of + + + +, it equals eighty, the letter peh

40 + 20 + 10 + 6 + 4 = 80

The peh is the seventeenth letter of the alef-bais, the numerical value of the word tov, meaning good. It is a five-sided figure, four on the outside and a yud within, representing G-d's Infinite light clothed within the finite physical dimensions of time and space.

If you add the numeric values of + + + + +,

80 + 40 + 20 + 10 + 6 + 4 = 160

it equals 160, which is the numerical value for , "TREE", or the Tree of Life; with it's ten sephiros, (ten is the numeric value of yud, in case you forgot) the six directions in space, back and forth in time, and the choice between good and evil. And as the peh had five sides, this word is made of two letters each with three parts, implying a six-sided shape.