This is a revised edition of 『Mr. Feynman!』 (Science Books, 1997), which has been loved by domestic readers for a long time.
Richard Feynman introduces memories of his father, who introduced him to the world of science as a young boy and taught him that what was important was not the name of an object, but the pattern or essence behind it, and that he should not believe that an authority named or explained something; the poignant love story of his first love and first wife, Arlene Feynman, who taught him that he should live by what he believed was right regardless of what others thought; and Feynman's activities in uncovering the secrets of the Challenger spacecraft disaster, which was almost turned into an unsolved case in the bureaucracy of the National Aeronautics and Space Administration (NASA).
And "Epilogue - The Value of Science," which concisely contains Feynman's long-term reflections on the meaning and value of science after the development of the atomic bomb, movingly shows that he, who hated philosophy, was a profound scientific thinker.

It would be a grave mistake to assume, despite our youth and ignorance, that we have already found the answer.
If we say, “This is the answer.
Friends.
If we suppress all other discussion and criticism by claiming, "Now we are saved!", we are keeping humanity bound in the chains of authority by the limited imagination we currently possess.
We have had this experience countless times before.
This is where our responsibility as scientists lies.
It is to assert the value of freedom by recognizing that great progress has been made from the philosophy of ignorance and that great progress is the fruit of free thought.
Freedom is not something to be feared, but rather welcomed, and it is our duty to future generations to demand freedom.

--- p.347