10 December | p.m

Verily, I have appointed One Who is the Center of My Covenant. All must obey Him; all must turn to Him; He is the Expounder of My Book, and He is informed of My purpose. All must turn to Him. Whatsoever He says is correct, for, verily, He knoweth the texts of My Book. Other than He, no one doth know My Book.

- Bahá’u’lláh, quoted by Abdu'l-Abhá in The Promulgation of Universal Peace, p. 322

Were it not for the protecting power of the Covenant to guard the impregnable fort of the Cause of God, there would arise among the Bahá'ís, in one day, a thousand different sects as was the case in former ages.

But in this Blessed Dispensation, for the sake of the permanency of the Cause of God and the avoidance of dissension amongst the people of God, the Blessed Beauty (may my soul be a sacrifice unto Him), has through the Supreme Pen written the Covenant and the Testament; He appointed a Center, the Exponent of the Book and the annuller of disputes. Whatever is written or said by Him is conformable to the truth and under the protection of the Blessed Beauty.

- Abdu'l-Bahá, Baha'i World Faith - Abdu'l-Bahá Section, p. 357