The teacher, when teaching, must be himself fully enkindled, so that his utterance, like unto a flame of fire, may exert influence and consume the veil of self and passion. He must also be utterly humble and lowly so that others may be edified, and be totally self-effaced and evanescent so that he may teach with the melody of the Concourse on high -- otherwise his teaching will have no effect.
- 'Abdu'l-Baha ('Selections from the Writings of ‘Abdu'l-Baha')