WASHINGTON—In a stirring display of his commitment to the institution he pledged his life to 34 years ago, Associate Justice John Paul Stevens renewed his vows to the U.S. Supreme Court Tuesday. Entering the courtroom in a long flowing robe, Stevens walked down the aisle toward a misty-eyed Chief Justice John Roberts, who stood waiting to re-administer the oath. "I, John Paul Stevens, do solemnly swear to faithfully and impartially discharge and perform all the duties incumbent upon me, till death do I part," declared a radiant Stevens. "I only wish [late President] Gerald [Ford] could have been here to give me away again." The ceremony was followed by a modest but elegant reception at the Kennedy Center, where Roberts and the 89-year-old Stevens shared the honorary first dance.