Teaching is of course the head corner-stone of all Bahá'í service, but successful teaching is dependent upon many factors, one of which is the development of a true Bahá'í way of living and the fulfilment of responsibilities which we have incurred.
- Shoghi Effendi (From a letter dated 3 June 1952 written on behalf of Shoghi Effendi to an individual believer; The Compilation of Compilations, vol. II, Guidelines for Teaching)