“...In this book, I speak of the human aura, and its colors, as being perceived by astral or
clairvoyant vision, for this is the way in which it is perceived and studied by the occultist. The
occult teaching is that, in the evolution of the race, this astral vision will eventually become the
common property of every human being—it so exists even now, and needs only development to
perfect it. But modern physical science is today offering corroborative proof (though the sam ...