Egyptian Pyramid Theory

The upright, therefore, may be likened to the male, the base to the female, and the hypotenuse to the child of both, and so Ausar [Osiris] may be regarded as the origin, Auset [Isis] as the recipient, and Heru [Horus] as perfected result. Three is the first perfect odd number: four is a square whose side is the even number two; but five is in some ways like to its father, and in some ways like to its mother, being made up of three and two. And panta [all] is a derivative of pente [five], and they speak of counting as numbering by fives. Five makes a square of itself.

Source:
http://www.egypt-tehuti.org/general-information/the-learned-ancient-egyptians-2/the-egyptian-sacred-numerology/

Among others, that is the second perspective I've read of the same thing, the last one had the triangle the other way around.

You have the earthly elements along the bottom, the ascent through the father along the top, animals/humans, and finally the son going through the soul elements (for want of a better word).

If you want more on this, please take a look at us decoding Babylon, second page in becomes more universal:

http://www.resistance2010.com/group/etymology-and-ciphering/forum/topics/visualise-babylon