In 1873, Bahá’u’lláh completed His most important work, the Most Holy Book (Kitáb-i-Aqdas), written in the House of ‘Údí Khammár, now part of the House of ‘Abbúd. The book outlines the essential laws and principles to be observed by His followers, lays the groundwork for Bahá'í institutions, and articulates His vision for the development of human civilization.
Bahá’u’lláh stated: "They whom God hath endued with insight will readily recognize that the precepts laid down by God constitute the highest means for the maintenance of order in the world and the security of its peoples."(21)