May 21

To the care of Mullá Husayn He [the Báb] committed a mission, more specific in character and mightier in import. He affirmed that His covenant with him had been established, cautioned him to be forbearing with the divines he would encounter, directed him to proceed to Tihrán, and alluded, in the most glowing terms, to the as yet unrevealed Mystery enshrined in that city—a Mystery that would, He affirmed, transcend the light shed by both Hijáz and Shíráz. 
- Shoghi Effendi  (‘God Passes By’)