Anabotei
The twelfth patriarch was the Venerable Asvaghosa.- He asked the Venerable Punyayasas, "I wish to know the Buddha; what is Buddha?" The Venerable [Punyayasas] replied, "You wish to know the Buddha, but he who does not know is the Buddha." The master said, "Since Buddha is not knowing, how can I know that it is Buddha?" The Venerable said, "Since you do not know Buddha, how can you know that it is not Buddha?" The master said, "It is like a saw." The Venerable replied, "It is like wood. Now I ask, what does 'saw' mean?" The master said, "The Venerable and I are lined up evenly [like the teeth in the saw]. What does 'wood' mean?" The Venerable replied, "You are cut through by me." The master was suddenly awakened
(texte extrait du Dentoroku)