Original title: Chihar-Vadi
Written by Baha'u'llah in the Baghdad period
Baha'u'llah wrote the Four Valleys for the Sufi, Shaykh Abdu'l-Rahman Karkuki. The four 'valleys' refer to the four kinds of person who journey on the spiritual path to God. Baha'u'llah devotes the tablet to describing the characteristics of each type of wayfarer. The four valleys, in order, are: Self, Intellect, Love and Mystical Insight.
A detailed discussion on the Four Valleys can be found in Nader Saiedi: Logos and Civilization. Spirit, History and Order in the Writings of Baha'u'llah, University Press of Maryland, 2000, pp 79-110.