It is self-evident that humanity is at variance. Human tastes differ; thoughts, nativities, races and tongues are various. The need of a Collective Center, by which these differences may be counterbalanced and the people of the world be unified, is obvious. Consider how nothing but a spiritual power can bring about this unification; — for material conditions and mental aspects are so widely different that agreement and unity are impossible through outer means. But it is possible for all to become unified through One Spirit just as all may receive light from one sun… Today, His Holiness Baha’u’llah is the Collective Center of Unity for all humanity.
- ‘Abdu’l-Baha (‘Star of the West’, vol. 5, no. 16, December 12, 1914)