The only person you should try to be better than is the person you were yesterday.
数学的快乐来自于为理解而奋斗。
最好的解决方案往往来自于倾听那些每天在土地上劳作的人。
挑战在于让观众忘记他们正在观看一场表演。
你必须相信这个过程并相信自己。
The greatest use of life is to spend it for something that will outlast it.