Keywords: Tetrad.svg Four is the first number formed by the addition and multiplication of equals To the Pythagoreans this symbol and number represented justice as it is the first number that is divisible every way into equal parts Hemenway Priya “ Divine Proportion pp 55 Sterling Publishing ISBN 1-4027-3522-7 2006-08 Jossi public domain Square within Vesica Piscis configuration two circles of equal diameter the center of each being on the circumference of the other Pythagorean symbols Sacred geometry Vesica piscis |