A young physician named Kusuda heard that if one studies Zen, he will not be afraid to die. One day he concealed a dagger in his clothing and visited Zen Master Nanin, intending to see if the Master was afraid to die.
When Nanin saw Kusuda, he immediately said, “Hello, friend, how are you? We haven’t seen each other for a long, long time.”
Perplexed, Kusuda replied, “We have never met before.” “That’s right. I mistook you for another physician,” Nanin said. With such a beginning, Kusuda lost the chance of surprising him, so he
reluctantly asked for Zen instruction. Nanin said, “If you are a physician, treat your patients well. That is Zen.” Four times Nanin gave him the same teaching. Kusuda complained that he would not come anymore if he received the same teaching.
So Master Nanin said, “I will give you a koan.” And he gave him “Zen Master Joshu’s ‘Mu’, what was the meaning of that famous riddle?” Kusuda pondered and meditated and worked on it for two years. But Master Nanin kept saying, “You are not In yet.” Another year and a half went by. Kusuda’s mind became clear, and Mu became truth. He was enlightened in the end. Therefore, even his conspiracy to test and disprove the holy Teacher was good karma in disguise for him.
Kusuda is like a typical modern young man—curious, skeptical, pragmatic. He went to test the Master’s fear of death and wound up studying Zen for years. In the modern day lets imagine such an imbecile would come to test the perfect Master with tacit conditioned on materialism and so forth. Only when Kusuda’s mind became clear and he understood Mu as Mu, was he no longer concerned with fear of death. Many apparently intelligent individuals miss to achieve proper conception of the spirit of enlightenment because their acquired intellectual prejudices and conditionings work against them, in reality.
This shows that thorough knowledge of the three realities (body, mind and Spirit) as they are leads to the termination of the (dualistically experienced) relative reality (delusion/illusion/unreal). The actual perception of Suchness leads to the thorough knowledge of the perfect reality. The abandonment of dualistic perception leads to the (termination of) the imaginatively constructed reality. The intuitive experience of the knowledge of negative (heterodox paths or the conditioned knowledge such as economics, medicine etc.) conditioning (leads to the thorough knowledge of) the relative.