Thou hast written about the Fast. This
is a most weighty matter and thou shouldst exert thine utmost in its
observance. It is a fundamental of the Divine law, and one of the pillars of
the religion of God.
(‘Abdu’l-Baha, compilation ‘The Importance of Obligatory
Prayer and Fasting’, compiled by Research Department of the Universal House of
Justice; published in The American
Baha'i, September 2000)