The significance of Tablets and Addresses of ‘Abdu’l-Baha

Verily know that the Tablets (Book) of Abdul-Baha and his address is a hidden mystery and concealed fact. No one is informed of its greatness and importance at these times, but in the course of time and future centuries the signs thereof will be manifested, the lights thereof will dawn forth, the fragrances thereof will be diffused and the greatness, the importance thereof will be known. The truth I say unto thee, that each leaflet from Abdul-Baha will be a wide-spread book, nay, rather, a glistening gem on the Glorious Crown. Know thou its value and hold great its station. (‘Abdu'l-Baha, Tablets of Abdu'l-Baha v2, p. 267)