At a time in the Orient when even physical brotherhood was not in existence Bahá’u’lláh appeared. 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. Now—praise be to God!—the indissoluble spiritual association is evident; therefore, it is certain that divine civilization has been founded, and the world will progress and advance spiritually. 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. Their spiritual perceptions have developed; their intelligence has quickened; their souls are awakened. The utmost love has been manifested. Therefore, it is my hope that spiritual fraternity shall unite the East and the West and bring about the complete abolition of warfare among mankind. May it bind together individuals and members of the human family and be the cause of advancing minds, illuminating hearts and allowing divine bestowals to encompass us from all directions. May spiritual susceptibilities set hearts aglow with the message of glad tidings. May spiritual brotherhood cause rebirth and regeneration, for its creative quickening emanates from the breaths of the Holy Spirit and is founded by the power of God. Surely that which is founded through the divine power of the Holy Spirit is permanent in its potency and lasting in its effect.

Material brotherhood does not prevent nor remove warfare; it does not dispel differences among mankind. But spiritual alliance destroys the very foundation of war, effaces differences entirely, promulgates the oneness of humanity, revivifies mankind, causes hearts to turn to the Kingdom of God and baptizes souls with the Holy Spirit. Through this divine brotherhood the material world