Wisdom does not show itself so much in precept as in life - in a firmness of mind and mastery of appetite. It teaches us to do as well as talk; and to make our actions and words all of a color.
Source: In The Book of Success, ed. Richard Shea, 1993.
-- Lucius Annaeus Seneca, ( 4 BC-65AD), Roman philospher, statesman; He was a famed stoic who wrote eight tragedies; committed suicide at Nero's command.