A seminal document, written in three stages by `Abdu'l-Bahá. Several sections were written under imminent threat of harm. The first section was probably written in 1906. This document constitutes one of the central and defining pieces of Bahá'í primary source literature, and is considered to be intimately connected to Bahá'u'lláh's ('Abdu'l-Bahá's father) Most Holy Book. The Will and Testament, along with the Tablets of the Divine Plan and the Tablet of Carmel, were described by Shoghi Effendi as the charters of the Bahá'í administration.