In this way and for this reason the Eastern philosophers and sages concealed much of their most profound knowledge from the multitude, because they rightly recognised the limitations of narrow minds and prejudiced opinions. What the fool cannot learn he laughs at, thinking that by his laughter he shows superiority instead of latent idiocy. And so it has happened that many of the greatest discoveries of science, though fully known and realised in the past by the initiated few, were never disclosed to the many until recent years, when 'wireless telegraphy' and 'light-rays' are accepted facts, though these very things were familiar to the Egyptian priests and to that particular sect known as the 'Hermetic Brethren,' many of whom used the 'violet ray' for chemical and other purposes ages before the coming of Christ. Wireless telegraphy was also an ordinary method of communication between them, and they had their 'stations' for it in high towers on certain points of land as we have now. But if they had made their scientific attainments known to the multitude of their day they would have been judged as impostors or madmen. In the time of Galileo men would not believe that the earth moved round the sun,—and if anyone had then declared that messages could be sent from one ship to another in mid-ocean without any visible means of communication, he would probably have been put to torture and death as a sorcerer and deliberate misleader of the public. In the same way those who write of spiritual truths and the psychic control of our life-forces are as foolishly criticised as Galileo, and as wrongfully condemned.