April 21

The plenitude of His [Baha’u’llah] glory the Apostle of God had, moreover, as attested by Bahá’u’lláh Himself, compared to the “full moon on its fourteenth night.” His station the Imám ‘Alí, the Commander of the Faithful, had, according to the same testimony, identified with “Him Who conversed with Moses from the Burning Bush on Sinai.” To the transcendent character of His mission the Imám Husayn had, again according to Bahá’u’lláh, borne witness as a “Revelation whose Revealer will be He Who revealed” the Apostle of God Himself. 
- Shoghi Effendi  (‘God Passes By’)