September 15

... certain believers have the unpleasant duty of having to read such works [materials written by Covenant-breakers] in the course of their duty to protect the Faith-but the friends are warned, in the strongest terms, of the danger of reading such literature. Unless one is very well informed of the history of the Faith and is deeply confirmed in one's belief, the calumnies and distortions of truth contained in such literature can undermine one's faith. 
- The Universal House of Justice  (From a letter dated 2 October, 1974 to an individual believer; printed in ‘The Power of Covenant, Part Two’, by the NSA of Canada)