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"The imagination is the most powerful tool we have for understanding others."
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!
以这样奢侈的国君,去统治那些爱好奢侈的臣民,想要国家不动乱,是不可能的。 
The first man who, having enclosed a piece of ground, bethought himself of saying 'This is mine,' and found people simple enough to believe him, was the real founder of civil society.
教师个人的范例,对于青年人的心灵,是任何东西都不可能代替的最有用的阳光。
I am not afraid of being overpowered by the impression. It will pass away soon enough.