All the divine Manifestations have proclaimed the oneness of God and the unity of mankind. They have taught that men should love and mutually help each other in order that they might progress. Now if this conception of religion be true, its essential principle is the oneness of humanity. The fundamental truth of the Manifestations is peace. This underlies all religion, all justice. The divine purpose is that men should live in unity, concord and agreement and should love one another. Consider the virtues of the human world and realize that the oneness of humanity is the primary foundation of them all. Read the Gospel and the other Holy Books. You will find their fundamentals are one and the same. Therefore, unity is the essential truth of religion and, when so understood, embraces all the virtues of the human world. Praise be to God! This knowledge has been spread, eyes have been opened, and ears have become attentive. Therefore, we must endeavor to promulgate and practice the religion of God which has been founded by all the Prophets. And the religion of God is absolute love and unity.
- ‘Abdu’l-Baha (From a talk, 19 April 1912, Columbia University, New York; ‘The Promulgation of Universal Peace: Talks Delivered by 'Abdu'l-Bahá during His Visit to the United States and Canada in 1912’)
