Who said "One behaves as though one's own death is unimaginable."?

This quote is attributed to Sigmund Freud.

One behaves as though one's own death is unimaginable. - Sigmund Freud

"One behaves as though one's own death is unimaginable."

Sigmund Freud Death

Psychologist and Psychiatrist Austro-Hungarian 1856–1939

"The only way out is through."

"Being entirely honest with oneself is a good exercise."

"We are never so defenseless against suffering as when we love."

"Dreams are the royal road to the unconscious."

"Death doesn't scare me anymore."

"Death and I are old friends."

"Welcome to my world."

"Death is just the beginning."