The infallibility of the Guardian is confined to matters
which are related strictly to the Cause and interpretation of the teachings; he
is not an infallible authority on other subjects, such as economics, science,
etc. When he feels that a certain thing is essential for the protection of the
Cause, even if it is something that affects a person personally, he must be
obeyed, but when he gives advice, such as that he gave you in a previous letter
about your future, it is not binding; you are free to follow it or not as you
please.
(From a letter dated 17 October 1944 written on behalf of Shoghi
Effendi to an individual believer, included in a memorandum from the Research
Department of the Universal House of Justice, dated 13 October 1994)
