Dr. Ankenman argues that all psychological problems can be traced to emotional causes, even if physiological sources are also at play. All have their root in an inability to love. He distinguishes between depression and anxiety and shows how they may interact with one another. Depression is a feeling of not having any love, while anxiety is a feeling that love isn’t working. Temporary feelings of depression or anxiety don’t necessarily lead to the psychological disorders of the same name, especially when the feelings are brought on by circumstances such as death of a loved one.