Great men retire at forty

Alexander the Great conquered the world but died very young. Swami Vivekanand achieved greatness very early before his death at the age of 39. Great poet Subramanya Bharati also could hardly live beyond 40 years. Cricket God Sachin Tendulkar created history and became famous by the time he turned forty and took retirement after playing 200th test match on his home ground Mumbai where he started at the age of 16. +++++ Better to achieve something before one attains the age of forty?