In Indian Yogic tradition, this divine secret is called kundalini shakti and is depicted as a snake who lies coiled at the base of the spine until it is released by a master's touch or by a miracle, and which then ascends up through seven chakras, or wheels (which you might also call the seven mansions of the soul), and finally through the head, exploding into union with God. These chakras do not exist in the gross body, say the Yogis, so don't look for them there; they exist only in the subtle body, in the body that the Buddhist teachers are referring to when they encourage their students to pull forth a new self from the physical body the way you pull a sword from its sheath. My friend Bob, who is both a student of Yoga and a neuros-cientist, told me that he was always agitated by this idea of the chakras, that he wanted to ac-tually see them in a dissected human body in order to believe they existed. But after a particu-larly transcendent meditative experience, he came away with a new understanding of it. He said, "Just as there exists in writing a literal truth and a poetic truth, there also exists in a hu-man being a literal anatomy and a poetic anatomy. One, you can see; one, you cannot. One is made of bones and teeth and flesh; the other is made of energy and memory and faith. But they are both equally true."

I like it when science and devotion find places of intersection. I found an article in The New York Times recently about a team of neurologists who had wired up a volunteer Tibetan monk for experimental brain-scanning. They wanted to see what happens to a transcendent mind, scientifically speaking, during moments of enlightenment. In the mind of a normal think-ing person, an electrical storm of thoughts and impulses whirls constantly, registering on a brain scan as yellow and red flashes. The more angry or impassioned the subject becomes, the hotter and deeper those red flashes burn. But mystics across time and cultures have all described a stilling of the brain during meditation, and say that the ultimate union with God is a blue light which they can feel radiating from the center of their skulls. In Yogic tradition, this is called "the blue pearl," and it is the goal of every seeker to find it. Sure enough, this Tibetan monk, monitored during meditation, was able to quiet his mind so completely that no red or yellow flashes could be seen. In fact, all the neurological energy of this gentleman pooled and collected at last into the center of his brain—you could see it happening right there on the monitor—into a small, cool, blue pearl of light. Just like the Yogis have always described.

This is the destination of the kundalini shakti.

In mystical India, as in many shamanistic traditions, kundalini shakti is considered a dan-gerous force to play around with if you are unsupervised; the inexperienced Yogi could quite literally blow his mind with it. You need a teacher—a Guru—to guide you on this path, and ideally a safe place—an Ashram—from which to practice. It is said to be the Guru's touch (either literally in person, or through a more supernatural encounter, like a dream) which re-leases the bound kundalini energy from its coil at the base of the spine and allows it to begin journeying upward toward God. This moment of release is called shaktipat, divine initiation, and it is the greatest gift of an enlightened master. After that touch, the student might still labor for years toward enlightenment, but the journey has at least begun. The energy has been freed.