Another good quote from Leading for Growth:
Whether they like it or not, leaders have the power to scare the hell out of people. If you don’t fully explain what you are up to, you leave people in the dark, and people in the dark have vivid imaginations…You’ve got to give people information, and lots of it, so they don’t wonder what is really going on and start imagining all sorts of worst-case scenarios.
Very true, especially if you haven’t established a level of trust. People who don’t trust you have no reason to give you the benefit of the doubt and every reason to assume the worst.