The line between good and evil is often blurred.
善恶之间的界限常常是模糊的。
Every artist dips his brush in his own soul, and paints his own nature into his pictures.
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
黄金法则：想要别人怎么对待你，你就要怎么对待别人
The best way to guarantee a loss is to quit.
动力学的方程在用变分法的语言表达时是完全的。