Against this we may place the statement of Dr. Foveau de Courmelles, who speaks authoritatively for the whole modern French school. He says: “Every magnetizer is aware that certain individuals never can induce sleep even in the most easily hypnotizable subjects. They admit that the sympathetic fluid is necessary, and that each person may eventually find his or her hypnotizer, even when numerous attempts at inducing sleep have failed. However this may be, the impossibility some individuals find in inducing sleep in trained subjects, proves at least the existence of a negative force.” If you would ask the present writer’s opinion, gathered from all the evidence before him, he would say that while he has no belief in the existence of any magnetic fluid, or anything that corresponds to it, he thinks there can be no doubt that some people will succeed as hypnotists while some will fail, just as some fail as carpenters while others succeed. This is true in every walk of life. It is also true that some people attract, others repel, the people they meet. This is not very easily explained, but we have all had opportunity to observe it. Again, since concentration is the prerequisite for producing hypnotism, one who has not the power of concentration himself, and concentration which he can perfectly control, is not likely to be able to secure it in others. 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. They would be most likely to be subject to a person who had such a strong and well-balanced nervous constitution that it would be hard to hypnotize. And it is always safe to say that the strong may control the weak, but it is not likely that the weak will control the strong.