最大的风险是不冒任何风险。在一个快速变化的世界里，唯一注定失败的策略就是不冒险。
The biggest risk is not taking any risk. In a world that’s changing quickly, the only strategy that is guaranteed to fail is not taking risks.
The most important skill in mathematics is the ability to ask the right questions.
The secret of a happy old age is to have a good memory and a bad one.
The truth about the world, he said, is that anything is possible. Had you not seen it all from birth and thereby bled it of its strangeness it would appear to you for what it is, a hat trick in a medicine show, a fevered dream, a trance bepopulate with chimeras having neither analogue nor precedent, an itinerant carnival, a migratory tentshow whose ultimate destination after many a pitch in many a mudded field is unspeakable and calamitous beyond reckoning.
我们不能改变过去，但我们可以改变对过去的看法。