-- braving rain -- cheered as the pope emerged from the helicopter that took him to the site, where he held Mass.. In his homily, the pope called on the faithful to find hope in God. It is true that nowadays, to some extent, everyone, including our young people, feels attracted by the many idols which take the place of God and appear to offer hope: money, success, power, pleasure, Francis said. Often, a growing sense of loneliness and emptiness in the hearts of many people leads them to seek satisfaction in these ephemeral idols. His was an upbeat message, encouraging openness to being surprised by God and proclaiming that Christians can not be pessimists. The pope also announced that he will return to Brazil in 2017, the 300th anniversary of the apparition of Our Lady of Aparecida to three fishermen. Singing priests revive Catholic Church in Brazil CNN's Mariano Castillo contributed to this report.