The character of a gentleman is to eliminate distractions and interference, to cultivate body and mind with quietness and singleness, and to cultivate morality with thrift. If you can't be calm in your heart, don't aspire to fame and fortune, you can't define your ambition, and if you can't be quiet and single-minded, you can't achieve your lofty goal. Learning must be calm and single-minded, and talent comes from learning. If you don't study, you won't grow up brilliant, if you don't aspire to learn something, if you indulge in modernity, you won't inspire your spirit, and if you are frivolous and impetuous, you won't cultivate your temperament. Age passes quickly with time, will disappears with time, and finally withers and decays. Most of them have no contribution to society, so they can only sit in that broken house sadly. How could they regret it at that time?