Survivors of the earthquake that devastated central Italy must rebuild their hearts as well as their homes with a foundation built on hope, Pope Francis has said.

Families need something long lasting when coping with the heartbreaking wounds of losing their homes and loved ones, the Pope told survivors during an audience in the Vatican's Paul VI hall.

"It is not optimism, there is no place for optimism. Yes, for hope but optimism, which is momentary; it isn't sustainable. In order to rebuild, you need hope," the Pope said.