This book contains an important and key essay from the New Thought movement of the early 20th century. The hypothesis is that to realize fully how much of our present daily life consists in symbols is to find the answer to the old, old question, What is Truth? The book seeks to teach readers that there is an inner and outer side to everything; and the quality of the superficial mind which causes it to fail in the attainment of Truth is its willingness to rest content with the outside only.