Modern Ronin Reflections is a collection of essays on engineering, learning, discipline, and life from Dr. Jack Yeh, exploring the mindset of a modern-day ronin.
Modern Ronin Reflections
Knowledge becomes wisdom only through experience. Any idea grounded in real experience deserves respect. But when a claim is based merely on reasoning rather than lived experience, we must approach it with caution and openness. There is no absolute objectivity in knowledge. All knowledge is, at its core, subjective—because
Modern Ronin Reflections
I’ve been thinking about something: If a person never reflects on death, it is very difficult to truly understand life. In fact, I’ve begun to wonder— Without death as a teacher, would life have any meaning at all? It’s like a game with no ending, no time
Modern Ronin Reflections
When I was younger, I believed power had to be applied — forced into existence through effort. But after forty, I began to understand something different: True power does not come from force. It is not something you generate. It is something you release. When you are aligned with yourself, power
Modern Ronin Reflections
The real danger of our time isn’t anxiety. It’s how we measure our worth. When people feel guilty for resting, it’s not because they’re lazy. It’s because they’ve been conditioned to believe: They only have value when they produce. Over time, modern civilization has
Modern Ronin Reflections
I’ve never believed that schools or titles define a person. Where a PhD is earned makes little difference to me. What truly matters is what you build and what you leave behind. Prestige can become an invisible constraint. The moment you see yourself through a label, your choices begin
Modern Ronin Reflections
The human mind seems to run on a default program. We ignore the 99% we already have, and fixate on the 1% we lack. So we start adding— more achievements, more status, more validation— trying to feel complete. But this kind of addition has no end. Because when you act
Modern Ronin Reflections
We often talk about learning and personal growth. And yes, they matter. But there is something even more fundamental: Your health. From my own experience, one factor stands above the rest: Sleep. Getting enough sleep—ideally around 7 to 8 hours—is not optional. It is essential. Sleep is when
Modern Ronin Reflections
Every object we own quietly takes a share of our attention. It stays with us, not just physically, but mentally— occupying a small space in our awareness. That’s why I no longer seek to own more things. I choose carefully, and I let them stay longer. Because over time,
Modern Ronin Reflections
You are already whole. You do not need growth or achievement to become valuable. The problem is that most people forget this, and begin to chase, compare, and fall into FOMO (Fear of Missing Out). But that is an illusion. You don’t need to go through every form of
Modern Ronin Reflections
Many things are right—but not right for you. Many forms of growth are valuable—but not yours to pursue. The real difficulty in life is not doing too little, but wanting everything. The moment you learn to choose— what to let in, and what to let go— you begin
Modern Ronin Reflections
In Taiwan, working on motor drives often means doing two things at once: developing control algorithms and writing firmware. But over time, I’ve come to realize something very clearly— these two tasks use fundamentally different modes of thinking. When I’m working on control theory—deriving models, designing observers—
Modern Ronin Reflections
When you are lost in the mountains, speed is not your advantage. If your direction is wrong, the faster you run, the farther you move away from the right path. In the age of AI, this effect is amplified to the extreme. AI enables rapid execution, continuous output, and the