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.