Over breakfast at the American Library Association (ALA) Annual Conference, this author was asked, "What is authority? What does one know about the ways in which he/she determines credibility? Whom do you trust?" In this article, the author focuses on these questions in terms of administrators who have control over libraries. She provides a definition of the word "authority," and examines whether educators can effectively use their standby evaluation criteria to judge their own administrators. Information, properly applied, regarding the benefits of having professional teacher-librarians on staff will enable an administrator to develop a strong educational program. This administrator will know how to work with staff, and how to lead them in important goal setting and decision making that will ultimately result in high-achieving students. The author argues that a great leader radiates confidence and authority, and demonstrates trust in the classroom and library.