All existence is comprised of Shape and Matter. The physical realm, or plane, consists of only Four basic- or rudimentary shapes. When these shapes are intertwined, we begin see patterns and Matter- known as Archetypes. They lay the foundation for the entire Universe outside, and within us. These basic shapes are, simply, the Circle(O), Square(☐), Triangle(△), and Line(~). Everything you see around you, all Matter, is made up of these shapes. This is found in the principles of Sacred Geometry. All shapes are mathematically connected to each other, and create some pretty interesting patterns when placed together, in synchronicity- union.

As you know, a Circle has 360 degrees, or points of Light. A Square has four corners, perfect 90° angles within each corner. It also has four sides. If you add up the corners, mathematically, it equals that of a Circle- which is 360°. 90x4=360. Now, a triangle has only 3 corners, and 3 sides. Each of those corners are measured at 60°, if it is a perfect triangle. 60x3=180, which is half of, and thus measurably equated to 360. Perfect Symmetry. When you start dividing, and thus multiplying the Square, we notice some pretty interesting symbols. Ancient symbols, the Mystery archetypes. This is the foundation of all Magic and sorcery.
The first symbol you may notice is the Square and Compass, the Freemasonry symbol. This is also an ancient symbol of Fertility; sexual union. The triangle pointing up ^ represents the Yang, (Fire, Masculine) or Creative Force within the Universe. Athame. The V represents Yin, Water, the Divine Feminine, or Dark but receptive Force in the Universe. It is also shaped like a cup, that which holds water, the Chalice, or Womb. When merged, we get what can be recognized today as the international symbol of Freemasonry; Absent the G.
What you will also notice is how, when all these shapes are intertwined, in unison, create the archetype of the Pentagram- or 5 pointed star. This is the 5 Points of Light, or where spirit meets matter. These are the 5 elements- Earth, Water, Fire, Wind, and Spirit (the mind). The Pentagram is a symbol widely used by practitioners of the Arcane arts- you may know them as Witches. It is interesting to note that in order to properly create this Sigil, one would require the Square and compass. These are tools used to create perfect Circles, and measure angles for mathematical precision. When you illustrate, on paper or clay, the 4 universal shapes in Unison, you have created an alchemical Mirror. You have made matter(the paper) reflect your Light(intellect).
The mirror(the paper) reflects the square and compass, the Very tools used in the physical for it's inception. As above, so below. This sigil represents the Mathematical, or Measurable Order of the Universe, the Divine. It also illustrates the presence of Creation, or intelligent design. If we can measure the confines, or walls that bind us to this physical realm, we have evidence of a Creator(God). The practical probability of this kind of structured Order, being built with the precise and mathematically discernible design that it has, coming from some Random happenstance, or circumstantial Big bang theory, seems Highly unlikely. In this context, saying "God" does not exist would be akin to a Man, having been in-fact born into captivity, going on to Proclaim, "Prisons aren't real!" or "Prisons don't exist!". He lives in a spiritual jail, or Plato's Cave, for he cannot see the order or Walls which bind him. He cannot see past his own Shadow, as in Plato's allegory. So, is God a benevolent creator, or cruel jailer? Could he be both?
One last interesting thing to point out, is that the Seal of Daniel also represents the mysteries of the Golden Ratio.
There are only two original illustrations of Daniel's Seal known to exist, I am in possession of One of them- along with some arcane texts explaining the symbolism.