[Machine Translation] This is the most famous collection of poems by one of the most popular contemporary poets. The title poem, which is extremely popular, expresses the importance of continuing to think for oneself, and continuing to hone one's independent intellect. The crisp rhythm and strong message of the poem have resonated with many readers as a question to oneself, and has warned against the easygoing mind. This is a masterpiece that transcends the framework of modern poetry.