An excellent [[Mathematics|mathematical]] illustration of the unity of the Trinity is the [[Geometry|geometrical]] form of the [[Triangle|triangular]] three-sided ''[[tetrahedron]]'', a [[Pyramid (geometry)|pyramidal]] construct of a single, indivisible point extending into three [[equilateral]] triangular faces simultaneously united to a single triangular base<ref>[https://www.mathsisfun.com/geometry/tetrahedron.html tetrahedron (mathsisfun.com)]</ref>. This is especially evident when an equilateral tetrahedron is made of flawless transparent [[crystal]]. Through any one face of the crystal form each of the other sides is clearly visible. Each of the faces is a distinctly different face (they cannot be the same face) but all of them have exactly the same shape, the same size, and the same substance. What is predicated of any one of them is predicated of each of them. A tetrahedral crystal displayed standing on the flat surface of the jeweler's counter or the shelf of a display case cannot exist without three faces inseparably existing as extending from the single, undivided point of one apex to the same undivided triangular base at its base or foundation on which it stands: a single crystal, not three, with three faces, not one. | An excellent [[Mathematics|mathematical]] illustration of the unity of the Trinity is the [[Geometry|geometrical]] form of the [[Triangle|triangular]] three-sided ''[[tetrahedron]]'', a [[Pyramid (geometry)|pyramidal]] construct of a single, indivisible point extending into three [[equilateral]] triangular faces simultaneously united to a single triangular base<ref>[https://www.mathsisfun.com/geometry/tetrahedron.html tetrahedron (mathsisfun.com)]</ref>. This is especially evident when an equilateral tetrahedron is made of flawless transparent [[crystal]]. Through any one face of the crystal form each of the other sides is clearly visible. Each of the faces is a distinctly different face (they cannot be the same face) but all of them have exactly the same shape, the same size, and the same substance. What is predicated of any one of them is predicated of each of them. A tetrahedral crystal displayed standing on the flat surface of the jeweler's counter or the shelf of a display case cannot exist without three faces inseparably existing as extending from the single, undivided point of one apex to the same undivided triangular base at its base or foundation on which it stands: a single crystal, not three, with three faces, not one. |