Four is a magical number. Beyond three we enter the realm of manifestation. The number four is considered the first born thing as a result of procreation, two twos. Four is also the basis of the three-dimensional space. The simple solid known as the tetrahedron, of 'four faces', is made of four triangles, or four points or spheres and is as fundamental to the structure of . three-dimensional space as the triangle is to the plane. Four is also associated with the the material modes of manifestation (the four elements); Fire, Air, Earth and Water. Also, all everyday matter is appropriately made of just four particles: protons, neutrons, electrons and neutrinos. There are four cardinal directions, or cardinal points; North, East, South and West. Moreover, in ancient Egyptian religion, there are The 4 Sons of Horus: Qebehsenuef (hawk head), Hapi (baboon head), Duamutef (jackal head) and Imsety (man-headed). They were funerary divinities and were traditionally the guardians of the internal organs of the deceased. Each was associated with a particular organ, and also with a different cardinal point on the compass. Qebehsenuef (intestines, west), Hapi (lungs, north), Duamutef (stomach, east) and Imsety (liver, south).
The Arabic calligraphy on both prints is a verse from the Qura'an. My favorite translation I found was Sahih International's: "My mercy encompasses all things." (7: 156). God speaking in the first person about his mercy and it being unconditionally encompassing and eternal. I added it as a reminder for myself that even within all this theory, facts and contemplations about the significance of numbers, mercy still remains something that is so so vast to enclose all this.