"Of the countless essays on the work of Friedrich Nietzsche, the complete overview by Karl Jaspers continues to stand out as a unique achievement. Nietzsche is presented as a `great philosopher¿ in historical and systematically comprehensive terms. The expert opinion formulated by Jaspers, a psychiatrist, on Nietzsche¿s illness, which was based on all available medical data, remains of undiminished importance." Prof. Dr. Volker Gerhardt