The Tao (The Energy of Pure Consciousness)that can be expressed is not the eternal Tao; The name (The Manifestation of the Energy of Pure Consciousness)that can be defined is not the unchanging name.

The unmanifested is the source of creation; The manifested is the mother of all physical things.

From the eternal energy of non-existence, therefore, we serenely observe the mysterious beginning of the Universe; From the eternal existence we clearly see the apparent cycles of distinctions.

These two come from the same source but differ in name, and they both may be called the cosmic Mystery.

Reaching from the Mystery to the mysteries is the door to all knowing.

道可道，非常道；名可名，非常名。无，名天地之始；有，名万物之母。故常无，欲以观其妙；常有，欲以观其徼。此两者，同出而异名，同谓之玄。玄之又玄，众妙之门。

  诠释:  道是一种超人类的纯宇宙意识能源，是人类语言无法表述清楚的。由道显现为人类可见的物质世界万物是可以用人类语言来命名的，物质万物背后的根本意识能量是无法用人类语言来命名的。

   未显现的道是宇宙万物生成之本源，由道显现的宇宙万物是宇宙万物的诞生。因此，由未显现的道-纯宇宙意识能源，人类可以追溯到宇宙未形成前的奥妙；由道-纯宇宙意识能源，的物质万物显现可以观察到宇宙的千变万化。

   这两种形态同出于道的转化，都十分深邃奥妙，而这两种形态奥妙无穷的重叠和转换就是道的存在与显现，有形与无形变化的根本之门。