Carl Jung's thinking has colored the world of modern psychology more than many of those with casual knowledge realize. Such familiar terms, for instance, as "extrovert", "introvert", and "archetype" are all Jungian concepts ... borrowed and sometimes misused by others. But his overwhelming contribution to psychological understanding is his concept of the unconscious ... that is just as much a vital and real part of the life of an individual as the conscious ... the language and the "people" of the unconscious are symbols, and the means of communications dreams. Thus an examination of Man and his Symbols is in effect an examination of man's relation to this own unconscious. And since in Jung's view the unconscious is the great guide, friend, and adviser of the conscious, this book is related in the most direct terms to the study of human beings and their spiritual problems.