Program testing can be used to show the presence of bugs, but never to show their absence!
程序测试可以用来显示错误的存在，但永远不能显示它们的缺失！
"Courage is not the absence of fear, but the triumph over it."
对于真理的崇敬，是对智慧的最高礼赞。
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
数学不是关于数字、方程、计算或算法的：它是关于理解的。
True intelligence is about making machines understand human intentions, not making humans adapt to machines.
人は、失敗から学ぶことで成長する。
Fear of change stifles progress; understanding change directs it.