"Briefly, by the promulgation of these principles Bahá'u'lláh has caused the prejudices which afflicted the people of the Orient to disappear. The communities which have accepted His teachings are now living together in the greatest love and harmony. When you enter a meeting of these people, you will find Christians, Jews, Muslims, Zoroastrians, Buddhists gathered together in perfect fellowship and agreement. In their discussions the greatest spirit of tolerance and friendship has supplanted the former hostility and hatred witnessed among them." (Abdu'l-Baha, The Promulgation of Universal Peace, p. 301)

"Today Bahá'u'lláh is the Collective Center of unity for all mankind, and the splendor of His light has likewise dawned from the East. He founded the oneness of humanity in Persia. He established harmony and agreement among the various peoples of religious beliefs, denominations, sects and cults by freeing them from the fetters of past imitations and superstitions, leading them to the very foundation of the divine religions. From this foundation shines forth the radiance of spirituality, which is unity, the love of God, the knowledge of God, praiseworthy morals and the virtues of the human world. Bahá'u'lláh renewed these principles, just as the coming of spring refreshes the earth and confers new life upon all phenomenal beings. For the freshness of the former springtimes had waned, the vivification had ceased, the life-giving breezes were no longer wafting their fragrances, winter and the season of darkness had come. Bahá'u'lláh came to renew the life of the world with this new and divine springtime, which has pitched its tent in the countries of the Orient in the utmost power and glory. It has refreshed the world of the Orient, and there is no doubt that if the world of the Occident should abandon dogmas of the past, turn away from empty imitations and superstitions, investigate the reality of the divine religions, holding fast to the example of Jesus Christ, acting in accordance with the teachings of God and becoming unified with the Orient, an eternal happiness and felicity would be attained." (Abdu'l-Baha, The Promulgation of Universal Peace, p. 164)

"Everyone who truly seeks and justly reflects will admit that the teachings of the present day emanating from mere human sources and authority are the cause of difficulty and disagreement amongst mankind, the very destroyers of humanity, whereas the teachings of Bahá'u'lláh are the very healing of the sick world, the remedy for every need and condition. In them may be found the realization of every desire and aspiration, the cause of the happiness of the world of humanity, the stimulus and illumination of mentality, the impulse for advancement and uplift, the basis of unity for all nations, the fountain source of love amongst mankind, the center of agreement, the means of peace and harmony, the one bond which will unite the East and the West." (Abdu'l-Baha, The Promulgation of Universal Peace, p. 440)

"O Thou kind Lord! Unite all. Let the religions agree and make the nations one, so that they may see each other as one family and the whole earth as one home. May they all live together in perfect harmony. O God! Raise aloft the banner of the oneness of mankind. O God! Establish the Most Great Peace. Cement Thou, O God, the hearts together. O Thou kind Father, God! Gladden our hearts through the fragrance of Thy love. Brighten our eyes through the Light of Thy Guidance. Delight our ears with the melody of Thy Word, and shelter us all in the Stronghold of Thy Providence. Thou art the Mighty and Powerful, Thou art the Forgiving and Thou art the One Who overlooketh the shortcomings of all mankind." - Abdu'l-Baha, Promulgation of Universal Peace, p. 100