Inside and outside are one,
Movement and stillness are the same. 
In all these, functioning needs 
To be free and clear. 
If this is not so then 
All the Buddha’s holy sutras
And all of the sayings of the patriarchs 
Become mere tangles of empty words. 
The Way of Zen
And the Buddha-dharma
Also become dead things.

Tōrei Enji (1721 CE-1792 CE), Tōrei Enji was an eminent Japanese Zen Buddhist monk, teacher, author, painter and calligrapher.