Pranayama breathing exercises help clear the nadis, or channels, that carry prana the universal life force, allowing prana to flow freely. When the channels are clear and the last block at the base of the spine has been opened, Kundalini rises through the spine, through the central channel called the sushumna-nadi, and joins the crown chakra. According to the tradition, the release of Kundalini leads to enlightenment and union.

If you do yoga will you become enlightened?

Well…you might (of course, it could take a few lifetimes of diligent practice). But then again you might not. But it doesn't really matter because yoga is a process, and there's a lot of good to be had along the way.

What if you don't believe in talk about enlightenment, spirit and the rest of it?

That's okay, too. Yoga doesn't discriminate. Even if you don't believe in the spiritual side of life, you can still do yoga. Whether enlightenment, nadis, prana and Kundalini is literal truth, metaphor or myth is irrelevant. If you do yoga, chances are that you will feel its psycho-physiological effects.

Moreover, the concept of union has a powerful down-to-Earth meaning. Yoga helps us get in touch with our true selves.

Between work, home and all of the demands and stresses in between, it's easy to lose touch with who we are, that core essence with which we were born. Rushing around all day it sometimes feels like the "I" inside is simply the result of the things we do all day -- or the effects those things have on our minds, bodies and spirits.

Ever say "I am hungry" or "I am stressed"? We identify with our conditions. It's like "hungry" or "stressed" is a name (Hi. I'm Stressed. What's your name?) As a result, our identities shift with our moods and conditions.

In truth, however, we are not the conditions we experience or things we do. We are not our jobs or the thousands of tasks that make up our jobs. We are not the sensations or emotions we feel. We are not the car we drive or the house we live in. We are not "S/he Who Must Pay Bills." We are not Mr. and Ms. Stressed.

Strip away the emotions, sensations and conditions and somewhere deep down inside you are still there. Strip it all away and you find out who you really are.

The techniques developed by the yogis to transcend also help us strip away the things that try to mis-define us -- the emotions, sensations, desires, achievements and failures of daily life. Through yoga we learn to develop a greater awareness of our physical and psychological states. As a result, we're in a position to better manage our reactions to the thoughts, feelings and responses we have to the various situations we deal with every day.

With greater awareness comes the sensitivity and skill to find and remove the physical and psychological blocks that often keep us from our true selves. We no longer identify with our conditions. Instead of saying, "I am stressed," we begin to say, "I feel stress," or "stress is present." It's a subtle but powerful difference.

Or better yet, we say "I feel anxiety and fear, and that's causing stress and in particular it's causing tension in my neck and shoulder." So we breathe deeply to soothe the anxiety. We review the events that led to the onset of those feelings, and in the process they lose their grip on our nervous system. We intentionally relax our shoulder and neck to prevent the stress and tension from building into a permanent condition.

Yoga gives us control of ourselves. It helps cut through the layers of mis-identities that arise in response to our actions, experiences and feelings. It calms the frenzy, clears the clutter and allows us to get back in touch with ourselves.

Yoga is union with self. Or, as Patanjali, one of the great yoga sages, said: