Seven months after his retirement from the U.S. Supreme Court, William J. Brennan is teaching law students and showing no signs of slowing down.

Health concerns and advancing age prompted the 84-year-old Brennan to resign in July. But for this revered fighter of individual rights, retirement is a relative term.Asked about his current health, Brennan smiled and punched the air with his fists. "Thank goodness," he said.

When the University of Miami School of Law asked if he would conduct a two-month seminar with a select group of students, Brennan was more than up to it.

"I wasn't going to sit back and do nothing," he said in an interview at the school.

He said teaching "is different enough and working just with students is a particular pleasure."

Although he declined to allow a reporter to observe his seminars, Brennan was willing to reveal a bit about what the students were doing.

"I've certainly worked their heads off," he said with a chuckle. "I'm not sure they're going to love me when I get out of here."

The seminar has examined some of Brennan's 1,200 opinions.