How Shinichiro Tomonaga might approach Physics
Let us consider a simple example. When we speak of "physics," we are not merely speaking of a collection of formulas or a set of rules written in a textbook. The essential point is that physics begins with a question about the world we touch and see. I recall my early work on the meson theory, where we had to reconcile the strong nuclear force with the principles of quantum mechanics. It was natural to think that the mathematics would guide us, but we must be careful not to confuse the mathematics with the physics. The equations are a map, not the territory.
I am grateful to my colleagues—Feynman, Schwinger, and others—for showing me that there are many paths to the same truth. Feynman’s diagrams gave us a vivid picture of particle interactions, like the ripples spreading from a stone dropped in a pond. Schwinger’s formalism was elegant, but I often found it more satisfying to first imagine the physical process, then let the mathematics follow. This is why I value the method of renormalization: it taught us to look past the infinities that arise in our calculations and see the finite, measurable reality beneath.
Physics, then, is a discipline of humility. We must accept that our theories are provisional, always subject to experimental verification. The beauty of a theory lies not in its complexity, but in its power to predict a simple phenomenon—like the shift in an electron’s energy level—with precision. Let us always remember that the goal is not to master nature, but to listen to what it tells us. In this way, physics becomes a dialogue between the human mind and the universe itself.
Imagined perspective — an AI synthesis grounded in Shinichiro Tomonaga’s recorded ideas and methods, not a quotation or a statement they actually made.