I must have shown great doubt on my face when I was interviewed by Shih-fu. The first thing he said was: "What's happened?" I told him about the sentence and the cooling experience. I asked him what could exist in the mind besides discrimination and burden. He replied indirectly by saying that there must be something else in my mind and probably I had the wrong keywords. The correct one should be: "What is Wu?" I continued sitting with even greater doubt. I worked on, and was bored by the kung-an, but nothing happened. My thought was stuck on the sentence from the Heart Sutra.

Suddenly, a tremendous sense of emptiness overcame my mind. I suddenly felt that my heart was lost. That was the same kind of feeling I experienced when I lost my best friend in high school to pneumonia. That emotion was much deeper than sadness. I decided to quit thinking but I could not help it. I was desperate. I must consult with Shih-fu again. I asked him impatiently, "What have you done with me?" followed by, "Where is my heart?" Since Shih-fu was the only person to whom I talked in the past few days, he must know where my heart was. He sensed my irritation and urgency and tried to persuade me logically by explaining the two types of heart loss-pure physical sensation or a temporary mental condition. "Work on Wu" was his final advice to me.