Shoghi Effendi, who described the tablet as one of Baháʼu'lláh's most challenging works, writes about the Súriy-i Haykal, "words which reveal the importance He attached to those Messages, and indicate their direct association with the prophecies of the Old Testament", referring to the prophecy where Zechariah had promised the rebuilding of the Temple in the End of Times. In the Book of Zechariah it is recorded: