Whether in the Kitáb-i-Aqdas, the most weighty and sacred of all the works of Bahá'u'lláh, or in the Kitáb-i-'Ahd, the Book of His Covenant, or in the Suriy-i-Ghusn (Tablet of the Branch), such references as have been recorded by the pen of Bahá'u'lláh -- references which the Tablets of His Father addressed to Him mightily reinforce -- invest 'Abdu'l-Bahá with a power, and surround Him with a halo, which the present generation can never adequately appreciate.
- Shoghi Effendi ('The World Order of Baha'u'llah')