Every proof and prophecy, every manner of evidence, whether
based on reason or on the text of the scriptures and traditions, are to be
regarded as centered in the persons of Bahá'u'lláh and the Báb. In them is to
be found their complete fulfillment.
- ‘Abdu’l-Baha (Quoted by Shoghi Effendi in a letter dated February 8, 1934; ‘The World Order of Baha’u’llah)