Source: NY Review of Books, Jul 2011
The central theme of Feynman’s work as a scientist was to explore a new way of thinking and working with quantum mechanics. The book succeeds in explaining without any mathematical jargon how Feynman thought and worked. This is possible because Feynman visualized the world with pictures rather than with equations. Other physicists in the past and present describe the laws of nature with equations and then solve the equations to find out what happens.
Feynman skipped the equations and wrote down the solutions directly, using his pictures as a guide. Skipping the equations was his greatest contribution to science. By skipping the equations, he created the language that a majority of modern physicists speak. Incidentally, he created a language that ordinary people without mathematical training can understand. To use the language to do quantitative calculations requires training, but untrained people can use it to describe qualitatively how nature behaves.
In the end, Feynman’s greatest contribution to science was not any particular discovery. His contribution was the creation of a new way of thinking that enabled a great multitude of students and colleagues, including me, to make their own discoveries.
Related Resource: QFT, Aug 2010