Su Dong Po 蘇東坡 had a bossom friend Fo Yin 佛印 who was a Buddhist monk. One day, they meditated in the monastery where Fo Yin was based. When they came back to this world, Su asked Fo Yin, "what do you see in front of you?"
"A great scholar!" Fo Yin smiled, "and what do you see?"
"A pile of bull shit!" Su Dong Po was making fun of Fo Yin.
The monk smiled with more elegance when he heard Su's remark.
Su Dong Po went home with a light heart. At the door, he met his little sister. She asked why her brother looked so happy.
"Because I won this time." Every time Su was defeated by Fo Yin when they argued over Buddhism and philosophy.
"How?" his little sister asked.
Su Dong Po told her the whole story in high spirits. His sister commented,
"My dear brother, you lost again."
"What?" he protested.
"Fo Yin has knowledge and wisdom in his heart and that is why he saw a scholar in front of him. On the other hand, you had nothing but bull shit in your heart. Who won?"