May 30

Although teaching the Cause is the duty of every real Bahá'í and must be our main aim in life, to obtain the best results extensive and organized efforts at teaching must be by the approval and through the help and supervision of either the Local or the National Spiritual Assemblies. Shoghi Effendi hopes that you will translate your earnestness and enthusiasm into real service in close co-operation with the friends and the Assemblies. 

- Shoghi Effendi  (From a letter dated 31 May 1926 written on behalf of Shoghi Effendi to an individual believer; The Compilation of Compilations, vol. II, Guidelines for Teaching)