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.
世界上充满了神奇的事物，耐心地等待着我们的感官变得更加敏锐。
生活中最重要的事情不是利用你的收益，而是避免你的损失。
To imagine is everything, to know is nothing at all.