The best doctors must know how to balance between theory and reality. In "Travels," Michael Critchton explains how he spent three years at Harvard Medical school learning the basics of how certain conditions come about without knowing why they happen. Critchton is disappointed by how some doctors prefer to diagnose patients and leave the patient with more questions than answers. Some expect the people they are treating to take the prescribed medications without question. Although it's true that doctors know more about a person's body and how illnesses affect them than any other person, sometimes that knowledge is never enough. The reality is that patients prefer doctors who are more open with them, and are not afraid to share serious details about their health. Therefore, good doctors must know that theory is not the answer to every medical condition, knowing why the patient did what they did is also important.