My doctrine is to think the thought that is unthinkable, to practice the deed that is non-doing, to speak the speech that is inexpressible, and to be trained in the discipline that is beyond discipline. Those who understand this are near; those who are confused are far. The Way is beyond words and expressions, is bound by nothing earthly. Lose sight of it to an inch, or miss it for a moment and we are away from it.

- Sutra of Forty Two Chapters