““Some eighty years ago, Freud proposed that anxiety was “a riddle whose solution would be bound to throw a flood of light on our whole mental existence.” Unlocking the mysteries of anxiety, he believed, would go far in helping us to unravel the mysteries of the mind: consciousness, the self, identity, intellect, imagination, creativity—not to mention pain, suffering, hope, and regret. To grapple with and understand anxiety is, in some sense, to grapple with and understand the human condition.””