Fellow Annapolis author R. K. Caroland wrote a nice little book called “Find Your Way.” I especially appreciate what he wrote about assumptions:
One of our biggest mistaken assumptions is that everyone thinks like me. So most of the decisions that we make are based on the way we think. This of course leads us to assume that what’s good for us is good for everyone else. So when we jump to a particular conclusion about something, it is based on what we want it to be and this is the definition of an egocentric person.