"To study Abnormal psychology, we must have what might be called "great tolerance for ambiguity,"an ability to be comfortable with very tentative, often conflicting pieces of information."

"Familiarity with the subject matter encourages people to study Abnormal psychology."

Disadvantage: "All of us already developed certain ways of thinking and talking about behavior, certain words and concepts that somehow seems to fit."

"The crucial point is that the concepts and verbal labels we use in the serious study of abnormal behavior must be free of the subjective feelings of appropriateness ordinarily attached to certain human phenomena."