"The Faith is divided into three Ages: the Heroic, the Formative, the
Golden Age, as has been outlined in His Writings. The Heroic Age closed
with the Ascension of 'Abdu'l-Baha. The Formative Age is divided into
epochs. The first epoch lasted 25 years. We are now actually in the second
epoch of the Formative Age. How long the Formative Age will last is not
known, and there will probably be a number of epochs in it.
"The Divine Plan of 'Abdu'l-Baha is divided into epochs. The first
Seven-Year Plan constituted the first stage of the first epoch; the second
Seven-Year Plan constitutes the second stage; while the Ten-Year Crusade
will constitute the third stage of the first epoch of the Divine Plan. The
first epoch of the Divine Plan will conclude with the conclusion of the
Ten-Year Crusade."