It should be borne in mind, however, that Bahá’u’lláh has not restricted the delivery of His Message to a few individual sovereigns, however potent the scepters they severally wielded, and however vast the dominions which they ruled. All the kings of the earth have been collectively addressed by His Pen, appealed to, and warned, at a time when the star of His Revelation was mounting its zenith, and whilst He lay a prisoner in the hands, and in the vicinity of the court, of His royal enemy.
- Shoghi Effendi (‘The Promised Day Is Come’)