Mysticism Author:Evelyn Underhill 1911. A study in the nature and development of man's spiritual consciousness. This book falls naturally into two parts; each of which is really complete in itself, though they are in a sense complementary to one another. The first is intended to provide an introduction to the general subject of mysticism; while the second part contains a somewha... more »t detailed study of the nature and development of man's spiritual or mystical consciousness.« less