At first He set forth the principles of physical brotherhood and afterward founded the spiritual brotherhood. He breathed such a spirit into the countries of the Orient that various peoples and warring tribes were blended in unity. Their bestowals and susceptibilities became one, their purposes one purpose, their desires one desire to such a degree that they sacrificed themselves for each other, forfeiting name, possessions and comfort. Their fellowship became indissoluble. This is eternal, spiritual fellowship, heavenly and divine brotherhood, which defies dissolution.
Material civilization advances through the physical association of mankind.
The progress you observe in the outer world is founded mainly upon the fraternity of material interests. Were it not for this physical and mental association, civilization would not have progressed. In this radiant century divine knowledge, merciful attributes and spiritual virtues will attain the highest degree of advancement. The traces have become manifest in Persia. Souls have advanced to such a degree as to forfeit life and possessions for each other.