VATICAN CITY -

Since he became pope -- and earlier as an archbishop in Argentina -- Pope Francis has put concern for the poor and suffering at the center of his messages.

And he did so again today in his Easter message, saying his greetings were aimed at "every house and every family, especially where the suffering is greatest."

Francis also denounced what he described as the "selfishness" that he says plagues the world, threatening human life.

The more-than 250,000 people who gathered in St. Peter's Square on this Easter Sunday were rewarded with a visit from the new pontiff.

After celebrating Mass, Pope Francis stepped aboard his popemobile for a spin through the crowd, kissing babies and patting children on the head. One man handed Francis a jersey for the pope's favorite soccer team in Argentina. Francis briefly held it up, and the crowd roared in approval.