knowledge of the existence of this great Hermetic Principle will enable the student to better understand his own mental states, and those of other people. He will see that these states are all matters of degree, and seeing thus, he will be able to raise or lower the vibration at will-to change his mental poles, and thus be Master of his mental states, instead of being their servant and slave. And by his knowledge he will be able to aid his fellows intelligently, and by the appropriate methods change the polarity when the same is desirable.
