This treatise explores to clarify that the words and actions that had been considered ambiguous so far in the Analects were rather the teaching methods and processes that allowed disciples to learn the abstruse logic of life of Confucius. Among them, we looked at the sentence "wordless" that Confucius declared in the Analects and the sentence "Se si ju yi" that is famous for being difficult because of the unexpected words and actions between Guru and the disciples. These two sentences are cleverly linked, and Confucius declared that he would not speak in teaching, and as if dramatically reflecting this, Confucius answers Zaro's actions silently in the sentence "Se si ju yi". Until now, Confucius's silence had been treated only as a matter of language and practice, and the sentence "Se si ju yi" in the Analect was considered difficult and ambiguous. In this treatise, it can be seen that Confucius, in fact, tried to lead the disciples in a way similar to koan. Confucius led to the acquisition of the mysterious truth of life, especially based on the feelings and empathy between Guru and the disciples. Prior to Buddhism's koan, Confucius had already pursued the realization of similar methods and processes.