Sentence:  These <WSD>sages</WSD> include poet Carl Sandburg , statesman Jawaharlal Nehru and sculptor Jacques Lipchitz , in Volume One , and playwright Sean O'Casey , David Ben-Gurion , philosopher Bertrand Russell and the late Frank Lloyd Wright in the second set . 
Meaning of the word marked with <WSD> tags:  a mentor in spiritual and philosophical topics who is renowned for profound wisdom