The beloved Guardian's message of October 1957 clearly indicates that the two Auxiliary Boards must have distinct but complementary functions. In that message he charges the Protection Board with 'the specific duty of watching over the security of the Faith' and says that the duty of the Propagation Board would 'henceforth be exclusively concerned with assisting the prosecution of the Ten- Year Plan.'
It must also be borne in mind that these twin agencies derive their complementary functions from one and the same source, are interrelated, and their members act as 'deputies', 'assistants' and 'advisers' of the Hands of the Cause of God, and, now, the Continental Boards of Counsellors. It is further clear that Shoghi Effendi was reluctant to specify in too great detail matters related to the functioning of the Auxiliary Boards, preferring to leave such things to be worked out in the light of experience.
- The Universal House of Justice (From a letter to the International Teaching Centre, October 10, 1976; compilation: ‘Lights of Guidance’)