ROME  - Pope Francis on Sunday completed his installation as pontiff at an emotional ceremony in which he formally took possession of Rome’s St John Lateran basilica - the official seat of the city’s bishop. The pope was driven around the square in front of the basilica in an open-topped car with a crowd of thousands chanting “Long live the pope!” and one group holding up a banner reading: “We Love You!” The leader of the world’s 1.2 billion Catholics smiled and kissed children held up to him by members of his security detail. The strong wind forced Francis to take off his white skullcap as he waved to the faithful before the mass. Inside the giant basilica, Latin America’s first pontiff took time to speak to and embrace a long line of elderly and disabled people in wheelchairs in emotional scenes that drew rounds of applause from the congregation. “God always waits for us, even when we have left him behind,” the first non-European pope in nearly 1,300 years said in his homily, adding: “We hear many offers from the world around us but let us take up God’s offer instead.” “God’s patience has to call forth in us the courage to return to him, however many mistakes and sins there may be in our life,” he said.