drive fear out of the organization

People make mistakes all the time. So the question is not, "Do people make mistakes?" Human beings are fallible. You're obviously going to make mistakes. The only way to avoid making a mistake is to do nothing. The question becomes, "How fast are you going to recognize and learn from your mistakes?" In order to learn from your mistakes, you have to admit that you're fallible. In order to do that, you have to go back to the basic principle that W. Edwards Deming talked about a long time ago: You have to drive fear out of the organization.

People are afraid to tell the truth. People are afraid to admit mistakes, because they're afraid they're going to have career-ending or career-limiting consequences as a result.