An Excerpt from Living Tao, by Ilchi Lee
Straighten your spine in a way that is comfortable, not forced, so that your brain is not under pressure. The breath will enter your body comfortably only when you're well centered. Keep your legs uncrossed and put a comfortable smile on your face. These three things are the basics.
You shouldn't do unnatural and painful breathing, such as forcing yourself to take long breaths or holding your breath. You shouldn't breathe too rapidly, and you'll get drowsy if you breathe too slowly. Just breathe very simply.
As you breathe, focus solely on the energy center in your lower abdomen. Don't concern yourself with the different phenomena that appear before your eyes—with seeing auras, with darkness or brightness. Just watch your energy center and discard thoughts that would rush you.
You may find yourself vibrating as energy accumulates in your abdomen. This is natural and ok. Keep focusing on your energy center, letting yourself vibrate. The vibrations will disappear, and your body will start to grow warmer. This is when Water Up, Fire Down circulation will begin, making your head clearer. This is a state without any desire, fear, loneliness, or boredom.
Then, like a dragon appearing out of deep waters, the true nature that is the master of life, divinity, will appear. When you have encountered that, the ecstasy is indescribable. That is the mystery of the human body. Once you experience that, you won't be so caught up or led by worldly things.
Live within breathing. Everything will look new if you do. Rocks will seem new, trees will seem new, and even the stars of heaven will seem new. With mindful breathing practice, you'll feel your cells awakening and your consciousness awakening.