Students of history find a continuous chain of reference to the mysterious influence of one human mind over that of others. In the earliest records, traditions and legends may be found giving reference to the general belief that it was possible for an individual to exert some weird uncanny power over the minds of other persons, which would influence the latter for good or evil. And more than this, the student will find an accompanying belief that certain individuals are possessed of some mental power which bends even "things" and circumstances to its might. Way back in the dim past of man's history on this planet, this belief existed, and it has steadily persisted in spite of the strenuous opposition of material science, even unto the present day.