It is, I firmly believe, of the utmost urgent importance that, with unity of purpose and action firmly established in our midst, and with every trace of the animosity and mistrust of the past banished from our hearts, we should form one united front, and combat, wisely and tactfully, every force that might darken the spirit of the Movement, cause division in its ranks, and narrow it by dogmatic and sectarian belief.
It is primarily upon the elected members of the National Spiritual Assemblies throughout the Bahá'í world that this highly important duty devolves, as in their hands the direction and management of all spiritual Bahá'í activities have been placed and centralized, and as they constitute in the eyes of the people of their country the supreme body in that land that officially represents, promotes and safeguards the various interests of the Cause. It is my fervent prayer and my most cherished desire that the unfailing guidance of Bahá'u'lláh and the blessings of our beloved Master will enable them to set a high and true example to all other Bahá'í institutions and Local Assemblies, and will show them what absolute harmony, mature deliberation and whole-hearted co-operation can achieve. Should such a representative and responsible body fail to realize this fundamental requisite for all successful achievement, the whole structure is sure to crumble, and the Great Plan of the Future, as unfolded by the Master's Will and Testament, will be rudely disturbed and grievously delayed. (From a letter dated 9 April 1923 written by Shoghi Effendi to the National Spiritual Assembly of the United States and Canada, published in ‘Bahá'í Administration: Selected Messages 1922-1932’; The Compilation of Compilations, vol. I, National Spiritual Assembly)