The believing mind is not divided,
And undivided is the believing mind—
This is where words fail,
For it is not of the past, future, or present.
Under Tao-hsin (580–651), the fourth patriarch, Zen was divided into two branches. The one known as Godzuzen (Niu-t‘ou Chan),[4.42] did not live long after the passing of its founder, Fa-jung,[4.43] who lived at Mount Niu-t‘ou, and is considered not belonging to the orthodox line of Zen. The other branch was headed by Hung-jên[4.44] who is regarded by historians as the fifth patriarch, and it is his school that has survived. He came to the master when he was still a mere boy, and what pleased his master at their interview was the way he answered. When Tao-hsin asked[4.45] what was his family name 姓 ( hsing), he said,
“I have a nature 性 (hsing), and it is not an ordinary one.”
“What is that?”
“It is the Buddha-nature (fo-hsing).”
“Then you have no name?”
“No, master,” said the boy, “for it is empty in its nature.” Here is a play of words; the character denoting “family name” and that for “nature” are both pronounced hsing. When Tao-hsin was referring to the “family name” the young follower took it for “nature” purposely, whereby to express his view by a figure of speech.