"It is never too late to learn what is always necessary to know".
    Lucius Annaeus Seneca (4 BC - 65AD); Roman philosopher and statesman. (来源：老牌的英语学习网站 http://www.EnglishCN.com)

 "Confidence is the mother of carelessness."
       Baltasar Gracian (1601-1658); Spanish Jesuit writer.