(see related) Buenos Aires, March 19 - The pope's sister told ANSA Tuesday that her brother seemed "moved but his voice was very firm" at the mass inaugurating his papacy in St Peter's Square on Tuesday. "It was a wonderful ceremony. What really struck me was when he rode around the square in the pope-mobile," said Maria Elena Bergoglio. "It looks like he's been going through such moments with peace and harmony. For (our family), these days are like a mountain of joy".