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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.
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。
I pay no attention whatever to anybody’s praise or blame. I simply follow my own feelings.
人生は一度きりだから、後悔しないように生きよう。
The most important thing is that you have a North Star. You have to know where you're going.
The noblest pleasure is the joy of understanding.