Two Domains, One Sign
There are two domains, spacetime and the frequency domain, or form and anti-form, or extension and non-extension, or implicate and explicate, and there is a link, the tertium quid that eluded all past non-mathematical philosophers. We can assert by means of reason that the tertium quid is mathematics, as all is explaining in mathematical laws. We have the tool (mathematics) and the power (inner determinism free-will) to properly understand the forms and anti-forms of Life, the Universe and Everything.
Thus, there are two domains, and many contingent names were used to call them. As Arithmoi, we have a clear set of mathematical equations, functions, theorems and ideas to explain properly how this Dancing Pair comes into being. As we reveal actually, it was not let there be light, but rather light is. Thus light is eternal, necessary and sufficient. And by its wake it generates a finite contingent and compossible world. Thus we have that Light Is, and We as Light Beings are Becoming into the Extensible (physical) World.