importance, and I strongly advise my
students to give to it the attention and practice that its importance
merits. The practice, thereof, however, is extremely simple, and the
principle of the practice, moreover, is based solely upon the facts of
the relation of color and mental states, as shown in the astral auric
colors, as fully explained in the preceding chapters of this book.

In order to intelligently practice the development of the aura by means
of flooding or charging it with the vibrations of psychic colors, it is
first necessary that the student be thoroughly familiar with the scale
of colors related to each set of mental states or emotional feelings.
This scale and its key is found in a number of places in the preceding
chapters.

The student should turn back the pages of this book, and then carefully
re-read and re-study every word which has been said about the relation
of mental states and auric colors. He should know the mental
correspondence of the shades of red, yellow, and blue, so thoroughly
that the thought of one will bring the idea of the other. He should be
able to think of the corresponding group of colors, the moment he thinks
of any particular mental state. He should be thoroughly familiar with
the physical, mental, and spiritual effect of any of the colors, and
should moreover, test himself, psychically, for the individual effects
of certain colors upon himself.

He should enter into this study with interest and earnestness, and then
by keeping his eyes and ears open, he will perceive interesting facts
concerning the subject on every side in his daily work and life. He will
perceive many proofs of the principle, and will soon amass a stock of
experiences illustrating each color and its corresponding mental state.
He will be richly repaid for the work of such study, which, in fact,
will soon grow to be more like pleasure than like work.

Having mastered this phase of the subject, the student should give
himself a thorough, honest, self-examination and mental analysis. He
should write down a chart of his strong points and his weak ones. He
should check off the traits which should be developed, and those which
should be restrained. He should determine whether he needs development
along physical, mental, and spiritual lines, and in what degree. Having
made this chart of himself, he should then apply the principles of
charging the aura with the color vibrations indicated by his self
diagnosis an