82. It is with this strong conviction of faith, and with awareness of the heritage of human values which the observance of Sunday entails, that Christians today must face the enticements of a culture which has accepted the benefits of rest and free time, but which often uses them frivolously and is at times attracted by morally questionable forms of entertainment. Certainly, Christians are no different from other people in enjoying the weekly day of rest; but at the same time they are keenly aware of the uniqueness and originality of Sunday, the day on which they are called to celebrate their salvation and the salvation of all humanity. Sunday is the day of joy and the day of rest precisely because it is "the Lord's Day", the day of the Risen Lord.
83. Understood and lived in this fashion, Sunday in a way becomes the soul of the other days, and in this sense we can recall the insight of Origen that the perfect Christian "is always in the Lord's Day, and is always celebrating Sunday". (131) Sunday is a true school, an enduring programme of Church pedagogy — an irreplaceable pedagogy, especially with social conditions now marked more and more by a fragmentation and cultural pluralism which constantly test the faithfulness of individual Christians to the practical demands of their faith. In many parts of the world, we see a "diaspora" Christianity, which is put to the test because the scattered disciples of Christ can no longer easily maintain contact with one another, and lack the support of the structures and traditions proper to Christian culture. In a situation of such difficulty, the opportunity to come together on Sundays with fellow believers, exchanging gifts of brother- hood, is an indispensable help.