Carl Jung's theories made him one of the world's most influential analysts. With a combination of charisma, simplicity and brutal outspokenness, he inspired in his patients deep hatred and overpowering love in equal measure. Some he saved from psychosis, while he drove others to despair. Yet up until his death in 1961, he initiated groundbreaking ideas, but only trusted his impulses. With impeccable research - including access to unpublishing and previously unused material - Ronald Hayman reveals what went on during Jung's sessions with patients, and explores the great man's own sanity. Other biographers have either celebrated him as an idol or condemned him for his failings. In Jung, Hayman neither ignores his faults nor exaggerates them. The result is a rare insight into how Jung's revolutionary ideas grew out of his own extraordinary experiences.