In the Order of Bahá’u’lláh there are certain functions which are reserved to certain institutions, and others which are shared in common, even though they may be more in the special province of one or the other. For example, although the Hands of the Cause of God have the specific functions of protection and propagation, and are specialized for these functions, it is also the duty of the Universal House of Justice and the Spiritual Assemblies to protect and teach the Cause—indeed teaching is a sacred obligation placed upon every believer by Bahá’u’lláh. Similarly, although after the Master authoritative interpretation was exclusively vested in the Guardian, and although legislation is exclusively the function of the Universal House of Justice, these two Institutions are, in Shoghi Effendi’s words, “complementary in their aim and purpose.” “Their common, their fundamental object is to ensure the continuity of that divinely appointed authority which flows from the Source of our Faith, to safeguard the unity of its followers and to maintain the integrity and flexibility of its teachings.” Whereas the Universal House of Justice cannot undertake any function which exclusively appertained to the Guardian, it must continue to pursue the object which it shares in common with the Guardianship.
As you point out with many quotations, Shoghi Effendi repeatedly stressed the inseparability of these two institutions. Whereas he obviously envisaged their functioning together, it cannot logically be deduced from this that one is unable to function in the absence of the other. During the whole thirty-six years of his Guardianship Shoghi Effendi functioned without the Universal House of Justice. Now the Universal House of Justice must function without the Guardian, but the principle of inseparability remains. The Guardianship does not lose its significance nor position in the Order of Bahá’u’lláh merely because there is no living Guardian. We must guard against two extremes: one is to argue that because there is no Guardian all that was written about the Guardianship and its position in the Bahá’í World Order is a dead letter and was unimportant; the other is to be so overwhelmed by the significance of the Guardianship as to underestimate the strength of the Covenant, or to be tempted to compromise with the clear texts in order to find somehow, in some way, a “Guardian.”
- The Universal House of Justice (From a message dated 27 May 1966 to an individual believer; Online Baha’i Reference Library of the Baha’i World Center)