Excellent firms don't believe in excellence -- only in constant improvement and constant change.

Summary

This quote suggests that truly exceptional companies do not rest on their laurels and believe that they have achieved excellence. Instead, they are constantly striving for improvement and embracing change as a fundamental part of their success. They understand that the business landscape is constantly evolving and that stagnation leads to mediocrity. By continually challenging and bettering themselves, these companies remain at the forefront of their industries, always pushing the boundaries of what is possible. The emphasis is on a perpetual cycle of enhancing processes, products, and services rather than settling for a state of perceived excellence.