Dr. Jack Yeh (Chih-Chun Yeh) | Motor Drive Architect | Robotics & Control Systems | Springer Author | IEEE Senior Member | Founder of MotorControl.School | Building the world's leading motor-control learning platform | U.S. NIW Approved
Modern Ronin Reflections
After finishing Vagabond, I found myself reflecting on a fascinating question. Miyamoto Musashi lived during a unique transition in Japanese history—from the chaos of the Warring States period to the long peace of the Edo era. During the age of war, strength had a clear purpose. Strength meant survival.
Modern Ronin Reflections
One of the things I admire most about Japanese culture is its extraordinary level of resolution. As an engineer, I often use the word resolution to describe how finely a system can observe and distinguish details. The higher the resolution, the more information becomes visible. The world itself does not
Notes
Today, I finally finished reading Takehiko Inoue's Vagabond. Although the series remains unfinished at thirty-seven volumes, it already feels complete in the questions it asks and the insights it offers. For readers looking for an action-packed manga, Vagabond may not be what they expect. Its greatest
Notes
This photo was taken when the Chinese edition of my book, AC Motor Control Loop Design, was published. The stacks of books on the table were not inventory for bookstores. They were signed copies prepared for students who enrolled in my online courses. At that time, I organized a special
Modern Ronin Reflections
While reading Vagabond, I often found myself experiencing a strange sense of familiarity. Not because Musashi’s life resembles my own. But because many of the truths he gradually discovers resonate deeply with lessons I have encountered throughout my own journey. In the later chapters of Vagabond, water appears repeatedly
Modern Ronin Reflections
After the Battle of Sekigahara, Tokugawa Ieyasu unified Japan, ushering in more than 260 years of peace under the Tokugawa shogunate. But before that, Japan was in the Sengoku era — a true age of war. In that world, the role of the samurai was simple: * to fight, * to survive, * to
Modern Ronin Reflections
I used to think growth came from effort alone. But over time, I realized that true breakthroughs do not come merely from working harder. They come from finally seeing your own weaknesses clearly. That is what I saw in Vagabond. Every time Musashi truly evolved, it was not because he
Modern Ronin Reflections
From my own experience, I have gradually realized that what truly exhausts a person is often not the external world itself. But rather: * internal conflict * fragmentation * anxiety * excessive concern about others’ opinions * living constantly through a persona When energy continuously leaks outward, the mind becomes unstable, scattered, and psychologically weak.
Notes
《浪人劍客》中宮本武藏早期的執念與轉變 最近看到《浪人劍客》前期， 尤其是寶藏院那一段時， 我突然理解了一件很深的事情： 宮本武藏早期對「變強」的執念， 其實並不是真正的強。 而是一種來自內在匱乏與外部評價的渴望。 年輕時的武藏， 腦中只有一件事： 「我要變強。」 「我要天下無雙。」 因此他的邏輯非常簡單粗暴： 只要打倒所有強者， 只要把所有人都擊敗， 那麼自己就應該是最強的人。 這是一種非常原始、 非常野獸性的強。 但從心理學的角度來看， 這其實隱藏著一個巨大的問題： 他的評價機制是外部的。 他並沒有真正建立自己的內在價值系統。 因此， 當別人問他： 「那你覺得你自己強嗎？」 武藏竟然回答不出來。 這一幕其實非常震撼。 因為這代表： 他根本不理解什麼叫做真正的強。 他只能透過： • 別人的恐懼 • 別人的稱讚 • 別人的敬畏 • 別人的認可 來確認自己的存在。 所以哪怕他真的殺光所有強者， 成為天下第一， 他依然是奴隸。 因為他的內心， 仍然被「外部評價」所控制。 只要一個人的價值感， 建立在他人的眼光之上， 那麼他就永遠無法自由。
Modern Ronin Reflections
Each of us is born into a culture by accident. Nationality, ethnicity, religion, and identity are often not conscious choices, but conditions assigned at birth. Therefore, the healthiest relationship between human beings and culture should not be one of obedience or psychological captivity. Instead: Human beings should have the freedom
Modern Ronin Reflections
What resonates with me most about Miyamoto Musashi is not merely his solitude. It is this: He once seriously considered becoming part of the world. As a young man, Musashi also desired: * recognition, * honor, * status, * achievement, * and the possibility of serving a lord. He was not born detached from society.
Notes
In 2022, I walked away from a stable job in Taipei, Taiwan. At the time, I was working as a PM for Rockwell Automation products at Solomon Technology. From the outside, it looked like a safe and respectable career path. But deep inside, I kept hearing a quiet voice: “This