There is danger in the comfort zone

What exactly is the “danger” implied in the saying “there is danger in the comfort zone” ? The danger is becoming so relaxed in what we do and what we know , that any kind of change in our daily routine becomes frightening, and that limits us from exposing our total potential and getting the most out of our work day and our lives.

We reach a point in our work life where we say hey, I've made it far enough, I've paid my do's, I make good money, I have a nice car, that's great! You have worked hard and accomplished plenty, you are entitled to every accolade associated with success, but why stop there?

-extracted from “There is Danger in the Comfort Zone” by Jay Conners