" As discussed in Chapter 1, there is a human tendency to desire and even artificially create a sense of certainty. It is conceivable that the point here is not that we do not see the problems in our processes, but rather that we do not want to see them because that would undermine the sense of certainty we have about how our factory is working. It would mean that some of our assumptions, some things we have worked for and are attached to, may not be true. "

― , Toyota Kata: Managing People for Improvement, Adaptiveness and Superior Results