The seeker whose preconceived picture of what constitutes a master is correct--but this is uncommon--will be able to recognize one at their first meeting. He will feel with positive certainty the inner greatness of the master. Yet it does not follow that this is his particular master. There must also be a feeling of personal affinity as well as an intellectual appeal of the doctrines taught.
-- Notebooks Category 1: Overview of the Quest > Chapter 6: Student-Teacher > # 216