Vicious criticism is indeed a calamity. But its root is lack of faith in the system of Bahá'u'lláh (i.e. the administrative order) and lack of obedience to Him - for He has forbidden it. If the Bahá'ís would follow the Bahá'í laws in voting, in electing, in serving, and in abiding by assembly decisions, all this waste of strength through criticizing others could be diverted into cooperation and achieving the Plan." (From a letter dated December 18, 1949, written on behalf of Shoghi Effendi to an individual believer; Compilation on ‘Criticism: Extracts from letters written on behalf of the Guardian to individual believers’, prepared by the Research Department of the Universal House of Justice)