This episode's headline: Global Vision; Defining Limits. The guests include PRESIDENT CLINTON; JIM HOAGLAND, The Washington Post; ZBIGNIEW BRZEZINSKI, Former National Security Adviser; REP. DONALD PAYNE, [D] New Jersey; SEN. NANCY KASSEBAUM, [R] Kansas; ELLEN BRAVO, Executive Director, ""9 to 5""; DOROTHY RABINOWITZ, The Wall Street Journal; ERICA JONG, Author; CORRESPONDENT: ELIZABETH BRACKETT. Byline: In New York: MARGARET WARNER; In Washington: JAMES LEHRER