Outwardly, all activities cease;
Inwardly, the mind stops its panting.
When one’s mind has become a wall,
Then he may begin to enter the Tao.

Bodhidharma (5c -6c ?-), Bodhidharma was a semi-legendary Buddhist monk who lived during the 5th or 6th century. He is traditionally credited as the transmitter of Chan Buddhism to China, and regarded as its first Chinese patriarch.