When an end is lawful and obligatory, the indispensable means to it are also lawful and obligatory. 如果一个目的是正当而必须做的，则达到这个目的的必要手段也是正当而必须采取的
If you put out your hands, you are a laborer; if you put out your hands and mind, you are a craftsperson; if you put out your hands, mind, heart and soul, you are an artist. 如果你用双手工作，你是一个劳力；如果你用双手和头脑工作，你是一个工匠；如果你用双手和头脑工作，并且全身投入，你就是一个艺术家
The world can be changed by man"s endeavor, and that this endeavor can lead to something new and better. No man can sever the bonds that unite him to his society simply by averting his eyes. 人经过努力可以改变世界，这种努力可以使人类达到新的、更美好的境界。没有人仅凭闭目、不看社会现实就能割断自己与社会的联系
Only those who have the patience to do simple things perfectly ever acquire the skill to do difficult things easily. 只有有耐心圆满完成简单工作的人，才能够轻而易举地完成困难的事
The decline of literature indicates the decline of a nation; the two keep in their downward tendency. 文学的衰落表明一个民族的衰落。这两者走下坡路的时间是齐头并进的
Life can only be understood backwards; but it must be lived forwards. 要理解人生，需要向后看，但要更好地生活，就必须向前看
Histories make men wise; poems witty; the mathematics subtle; natural philosophy deep; moral grave; logic and rhetoric able to contend. 历史使人明智，诗词使人灵秀，数学使人周密，自然哲学使人深刻，伦理使人庄重，逻辑修辞学使人善辨
I want to bring out the secrets of nature and apply them for the happiness of man. I don"t know of any better service to offer for the short time we are in the world. 我想揭示大自然的秘密，用来造福人类。我认为，在我们的短暂一生中，最好的贡献莫过于此了
If a man empties his purse into his head, no man can take it away from him. An investment in knowledge always pays the best interest. 倾己所有追求知识，没有人能夺走它，向知识投资，收益最佳
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