This book examines the process used my most church missions organizations to evaluate missionary candidates for acceptance to the mission field. Most use personality tests, and psychological profiles to determine whether a candidate should service in the mission field or not. The Bobgan's stress the fact that these tests are very subjective and that they are very inaccurate. Also these tests do not take into account the leading of the Holy Spirit in a candidate's life.
The book asks the question; why would the church of Jesus Christ use humanistic theories formed by godless men to judge God's servants? The clear answer is it shouldn't.