
Gabriel Bouys / AFP - Getty Images
Pope Francis kisses a child after a Mass at the Vatican's St. Peter's Square as part of the Palm Sunday celebration on March 24.
By F. Brinley Bruton and Claudio Lavanga, NBC News
Pope Francis on Sunday led his first major service since his election, calling on the crowd to shun corruption and reach out to "the humble, the poor, the forgotten."
"Let us look around: How many wounds are inflicted upon humanity by evil! Wars, violence, economic conflicts that hit the weakest, greed for money, power, corruption, divisions, crimes against human life and against creation," he said.
The new pope invoked the wisdom of his grandmother and used simple language at the Palm Sunday service, which marks the start of the Holy Week of Easter in celebration of the crucifixion and resurrection of Jesus Christ.
Pope Francis departed from his prepared text, and when he referred to wealth, said: "You can't take it with you, my grandmother used to say."
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Gabriel Bouys / AFP - Getty Images
People carry palm fronds as they arrive in St. Peter's Square.

Max Rossi / Reuters
Pope Francis uses an aspergillum to sprinkle holy water as a blessing.

Alessandro Bianchi / Reuters
The faithful gather in St. Peter's Square for Pope Francis' Palm Sunday Mass at the Vatican.

Gregorio Borgia / AP
Cardinals from around the world gathered in the Vatican to elect the next leader of the Roman Catholic Church.