2, a bowl of hot and sour soup, what you heard and said, it is better to experience it yourself. -Lu Xun
3, wake up in your heart, and say that it is useless to talk on paper and not learn from yourself. —— Yan Yuan (Qing)
4. Since ancient times, the words of sages have been learned, and practice is the first, knowing words is the last. —— Lin Xiyuan (Ming)
Experience is the best teacher.