Rollo May challenges the idea that "mental health is living without anxiety," believing it is essential to being human. He explores how it can relieve boredom, sharpen sensibilities, and produce the tension necessary to preserve human existence. May sees a link extending from anxiety to intelligence, creativity, and originality, and guides the reader away from destructive ways to positive ways of dealing with anxiety. He convincingly proposes that anxiety can impel personal change, as it is only by confronting and coping with it that self-realization can occur.

In Existential Psychoanalysis, Sartre criticizes modern psychology in general, and Freud's determinism in particular. His often brilliant analysis of these areas and his proposals for their correction indicate in what direction an existential psychoanalysis might be developed.

Sartre does all this on the basis of his existential understanding of man, and his unshakeable conviction that the human being simply cannot be understood at all if we see in him only what our study of subhuman forms of life permits us to see, or if we reduce him to naturalistic or mechanical determinism, or...