...the power of the
Covenant will protect the Cause of Bahá'u'lláh from the doubts of the people of
error. It is the fortified fortress of the Cause of God and the firm pillar of
the religion of God.
- ‘Abdu’l-Baha (‘Tablets of the Divine Plan Revealed by
'Abdu'l-Bahá to the North American Bahá'ís’; The Compilation of Compilations,
vol. I, The Covenant)