You've probably met in your time some so-called "New Agers" who've claimed to be able to "read" your "aura." Supposedly, each person has an aura, or personal emanation, according to some beliefs. And of course, these soi-dissant "gurus" claim they can see yours, and give you a "reading." How come you can't see it? Well, I guess you're just not as refined, as yogically pure or spiritually advanced as they are; that's the (really rather insulting) implication. I miss the hippies, I really do, but this sort of thing always ticked me off. If you ever took them up on it, naturally it would turn out that there was something wrong with your "aura," something that only the self-appointed yogi-from-Muskogee, one of the lighter-than-air boys, could treat. Uh-oh, fraud alert! Well, there's a Seeker born every minute. Far more interesting, e.g. real, is the aura known to students of the physiology of the human mind. Twenty minutes before the pain of a migraine headache starts, many people experience it. During this time the sufferer may see intense colors, flashing lights, even monsters and apparitions. Lewis Carroll, a migraine victim most of his life, is said to have taken some of his characters for Alice in Wonderland from the apparitions he saw before attacks.