数学家研究纯数学不是因为它有用;他研究它是因为他喜欢它,他喜欢它是因为它美丽。
The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.
Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.
世间美好的事物往往不牢固,彩云容易消散,琉璃容易破碎
"The gladdest moment in human life, methinks, is a departure into unknown lands."