Sanity is perceived here ""in historic and biologic existence as the expression of competent patterns of development"" so that this study is a psychological-philosophical orientation, dealing largely in abstract terms and rather hazy concepts. If sanity is used in its broadest sense, and being is perhaps a closer definition of what is under consideration, man is viewed in his relational patterns with culture and society- as well as in his interpersonal contacts. What is man, his values and his drives? what part has heredity played in his development? what are his functions and adaptations? how are historic changes concomitant with value changes? how does man reveal his competence and growth- a growth which with the centuries requires an increasingly greater use of his intellect? All of this makes up a difficult discussion piece made more demanding by Dr. Haydn's professionalese.