koan
This Mind Is Not Buddha
Mumonkan, Case 33
Text
A monk asked Baso: "What is Buddha?" Baso said: "This mind is not Buddha." Mumon’s comment: If anyone understands this, he is a graduate of Zen. If you meet a fencing-master on the road, you may give him your sword, If you meet a poet, you may offer him your poem. When you meet others, say only a part of what you intend. Never give the whole thing at once.
Attribution
By Mazu Daoyi
From Mumonkan
Sources
Mumonkan case 33: This Mind Is Not Buddha