Also, since faith is a strong element, a person who has not perfect self-confidence could not expect to create confidence in others. While many successful hypnotizers can themselves be hypnotized, it is probable that most all who have power of this kind are themselves exempt from the exercise of it.
It is certainly true that while a person easily hypnotized is by no means weak-minded (indeed, it is probable that most geniuses would be good hypnotic subjects), still such persons have not a well balanced constitution and their nerves are high-strung if not unbalanced.