The most hateful torment for men is to have knowledge of everything but power over nothing.
纯数学和应用数学之间的相互作用是真正创新发生的地方。
所以,父母、老师、国君三者,都不能当作做事的法度。 
Life consists not in holding good cards,but in playing well those you hold.
Love cannot be forced, love cannot be coaxed and teased. It comes out of heaven, unasked and unsought.