This is a book containing the life story of Monk Gyeongbong.
The title of this book, 'Be a Fool', is the author's motto, which originated from Monk Gyeongbong.
The teachings of Monk Gyeongbong are that to live a proper human life, one must become a true human being, and to become a true human being, one must be able to abandon worldly calculations that measure oneself by money, fame, power, and instinct.
The teachings of Monk Gyeongbong are included in this book.