Shoghi Effendi feels that he can lay down no rule as to when one should introduce the names of the Báb, Bahá'u'lláh and 'Abdu'l-Bahá in one's teaching. Much depends on the temperament and aptitude both of the teacher and the one taught...
We must look to the example of the Master and follow our "Inner Light", adapting our message as best we can to the capacity and "ripeness" of the one we are seeking to teach.... Man 's spiritual digestive powers have similar laws to those that govern physical digestion. When people are spiritually hungry and thirsty they must be given wholesome and suitable spiritual food, but if we give too much at a time or too rich food for the digestive powers, it only causes nausea and rejection or malassimilation.
- Shoghi Effendi (From a letter dated 20 October 1925 written on behalf of Shoghi Effendi to two believers; The Compilation of Compilations, vol. II, Guidelines for Teaching)