The word “ foursquare” was a Greek term used to denote perfection in any form. The immensity of the Holy City was signified by the mathematical figure of twelve thousand furlongs, or approximately fifteen hundred cubic miles, expressed in the words of the text: The length and the breadth and the height of it are equal. It has been calculated that the measure of the twelve thousand furlongs in English miles computed 1378.97 exact English miles-- the figure having been reckoned by a biblical commentator of England. Whether exactly or approximately it was the symbolism, first of the spiritual perfection of the church and, second, of its universality--that it was destined to fill the whole earth. The prophet declared (Isaiah 11:9) that the knowledge of God would cover the earth; and Jesus said in the beatitudes (Matthew 5:5) that his disciples would inherit the earth--that is, fill the whole earth with his teaching. That has ever been and shall ever be the mission of his church, and that purpose was symbolized in the descriptions of the New Jerusalem.