A dragon, as spiritual luminosity, can be large or small, can rise or descend, can disappear or appear, can penetrate rocks and mountains, can leap in the clouds and travel with the rain. How can it do all this? Its done by the activity of the spirit.
What I realize as I observe this is the Tao of inconceivable spiritual transmutation. The reason humans can be humans is because of the spirit. As long as the spirit is there, they live. When the spirit leaves, they die.
The spirit penetrates heaven and earth, knows the past and present, enters into every subtlety, exist in every place. It enters water without drowning, enters fire without burning, penetrates metal and rock without a hindrance. It so large that it fills the universe, so small that it fits into a hairtip. It is imperceptible, ungraspable, inexplicable, indescribable.
One who can use the spirit skillfully changes in accordance with time, and therefore can share the qualities of heaven and earth, share the light of sun and moon, share the order of the four seasons, command nature in the primordial state, and serve nature in the temporal state. This is like the transformations of the spiritual dragon, which cannot be seen in the traces of form.
Awakening to the Tao
by Liu I-Ming translated by Thomas Cleary