Each individual portrayed in this book may, beyond his unique nature, be considered representative of one or several aspects of human nature and human striving, and for the obstacles such striving must encounter. Goethe displays the struggle for universal moral, scientific, and artistic values throughout lifetimes, bridging and linking whole ages. Nietzsche is perhaps the representative of the new faculty of inspiration and the challenge to complement it by intuition. Oscar Wilde represents the stage of soul development at which insight into the worthlessness of vanity and ambition dawns with the power of a purifying tempest. Kafka represents those millions of people who are drawn toward the threshold of the spiritual world but lack the courage to cross it. Eckstein, the great friend of Steiner's youth, is representative of the tendency to withhold esoteric knowledge from the majority of human beings and to keep it as a possession of "the privileged few," an attitude that still prevails in certain occult streams. Rudolf Steiner worked to make esoteric truths public and showed ways toward a radically new knowledge of the spirit and a new mobility of thought.