Viktor Frankl Quote

Those who know how close the connection is between the state of mind of a man-his courage and hope, or lack of them-and the state of immunity of his body will understand that the sudden loss of hope and courage can have a deadly effect. The ultimate cause of my friend's death was that the expected liberation did not come and he was severely disappointed.

From Death-camp to Existentialism: A Psychiatrist's Path to a New Therapy (ed. 1959)