A Roman Catholic archbishop has warned Chief Justice John Roberts and his fellow justices not to confuse what's popular with what's best for society.

United States Supreme Court Justices (Alex Wong/Getty Images)

On the eve of a Supreme Court term that could take up gay marriage, six of the nine justices attended the annual Red Mass to pray for judges at St. Matthew's Cathedral in Washington.

In the homily, Archbishop Timothy Broglio (BROH'-lee-oh) warned that not everything contemporary is good, and that society needs its ancient foundations. Otherwise, he said, "We run the risk of sinking into the mire of one popular sound bite after another."

Broglio said true faith extends beyond the walls of church and "must guide believers' words and decisions."

The Archdiocese of Washington says Justices John Roberts, Antonin Scalia, Elena Kagan, Anthony Kennedy, Clarence Thomas and Stephen Breyer attended the mass.
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