The true principle is one suchness:
Unobstrusive practice of inner application,
Unknown to anyone,
Is called nonleaking knowledge.
Nonleaking, inconceivable, is equivalent
To the immutability of space,
Not the current of birth and death.
The Way is the Highway,
Unimpeded nirvana full of wondrous capacities.
Only thus do you attain freedom in all activities.
- Nanquan (747–834)