The Pen of the Most High has recorded: "Fear of God is
the greatest commander that can render the Cause of God victorious, and the
hosts which best befit this commander have ever been and are an upright
character and pure and goodly deeds."
(Baha’u’llah, from the Kitáb-i-Ahd,
published in "Tablets of Bahá'u'lláh Revealed after the Kitáb-i-'Aqdas")