善于学习的人,能够透彻地知道事情的道理;善于实践的人,能够把事情疑难之处弄清楚。
天要使一个人遭祸,必先给他一点小小的好处使他轻信;天要使一个人受福,必先给他一点小小的祸患使他有所警惕。
Science is a wonderful thing if one does not have to earn one's living at it.