You are too generous to trifle with me. If your feelings are still what they were last April, tell me so at once. My affections and wishes are unchanged, but one word from you will silence me on this subject for ever.

文明被描述为人类与其环境相互作用的结果。

预测未来的最好方法就是创造未来。

What you get by achieving your goals is not as important as what you become by achieving your goals. At your funeral people will not recall what you did； they will only remember how you made them feel.

好的研究就像好的故事——有开头、中间和结尾，逻辑连贯。

「释义」：但凡学习不勤奋的人，必定是志向不够坚定。