In brief, the original purpose of temples and houses of worship is simply that of unity—places of meeting where various peoples, different races and souls of every capacity may come together in order that love and agreement should be manifest between them. That is why Bahá’u’lláh has commanded that a place of worship be built for all the religionists of the world; that all religions, races and sects may come together within its universal shelter; that the proclamation of the oneness of mankind shall go forth from its open courts of holiness—the announcement that humanity is the servant of God and that all are submerged in the ocean of His mercy. It is the Mashriqu’l-Adhkár. The world of existence may be likened to this temple and place of worship. For just as the external world is a place where the people of all races and colors, varying faiths, denominations and conditions come together—just as they are submerged in the same sea of divine favors—so, likewise, all may meet under the dome of the Mashriqu’l-Adhkár and adore the one God in the same spirit of truth; for the ages of darkness have passed away, and the century of light has come. Ignorant prejudices are being dispelled, and the light of unity is shining.
- ‘Abdu’l-Baha (From a talk, 30 April, 1912, Chicago, Illinois; ‘The Promulgation of Universal Peace: Talks Delivered by ‘Abdu’l-Bahá during His Visit to the United States and Canada in 1912’)