The history of the development of the four temperaments identifies the key men beginning with Hippocrates. Each of the four temperaments are described as well as the 15 patterns that are associated with the DISC instrument. Strengths and weakneses are identified for each blend.'The book is the result of personally interviewing over 15,000 people over a forty year period.

.John Cocoris has a B.A. from Tennessee Temple University, a Masters of Theology (Th. M.) from Dallas Theological Seminary, a Masters in Counseling (M.A.) from Amberton University, and a Doctorate in Psychology (Psy.D.) from California Coast University. John has been a licensed counselor in the state of Texas since 1997.