The Bobgans examine personality types and tests from a bibilcal, historical, and research basis and answer such questions as: How is astrology connected to the four temperaments and how are both connected to personality types and tests? Can knowing temperament and personality types foster Christian love and maturity? Why are the four temperaments so popular among Christians today? Are there any biblically or scientifically established temperament or personality types? Are personality inventories and tests valid ways of finding out about people?