The “sovereign remedy and mightiest instrument for the healing of all the world”

That which the Lord hath ordained as the sovereign remedy and mightiest instrument for the healing of all the world is the union of all its peoples in one universal Cause, one common Faith. This can in no wise be achieved except through the power of a skilled, an all-powerful and inspired Physician. This, verily, is the truth, and all else naught but error. Each time that Most Mighty Instrument hath come, and that Light shone forth from the Ancient Dayspring, He was withheld by ignorant physicians who, even as clouds, interposed themselves between Him and the world. It failed, therefore, to recover, and its sickness hath persisted until this day. They indeed were powerless to protect it, or to effect a cure, whilst He Who hath been the Manifestation of Power amongst men was withheld from achieving His purpose, by reason of what the hands of the ignorant physicians have wrought. 

- Baha'u'llah  (Tablet to Queen Victoria, Suriy-i-Haykal [Tablet of Temple]; ‘The Summons of the Lord of Hosts’)