October 17. On this date in 1944, Shoghi Effendi wrote "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."

October 17. On this date in 1944, Shoghi Effendi wrote (also here) "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."

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. (17 October 1944 written on behalf of Shoghi Effendi to an individual)