安全总是过度的，直到它不够为止。
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
数学不是关于数字、方程、计算或算法的：它是关于理解的。
And when you’re down in the hole， when that moment comes， it’s really okay to feel bad for a little while. Give yourself time to mourn what you think you may have lost but then here’s the key， learn from every mistake because every experience， encounter， and particularly your mistakes are there to teach you and force you into being more who you are. And then figure out what is the next right move.
The Internet is the most important single development in the history of human communication since the invention of the printing press.
The legacy of science is the betterment of humanity.
我们在地下做出的每一个决定都会对地面产生影响，这就是我们肩负的责任。