Speaking to L'Osservatore Romano, the Vatican's daily newspaper, Mr Blair said his new-found faith had become the driving force in his life.
He said he considers Pope Benedict's belief that God is central to politics, society, economics and culture to be "brilliant", the Guardian reports.
In the interview, Mr Blair spoke about his conversion and how important his new faith was to him. He recalled how, when he was a child, "in one of her rare moments of lucidity, during an illness, my great-grandmother – who was in many ways fantastic – told me, 'Do whatever you want but don't marry a Catholic.' Which is exactly what I did."...