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What's terrible is to pretend that second-rate is first-rate. To pretend that you don't need love when you do; or you like your work when you know quite well you're capable of better.

出自北齊·顏之推《顏氏家訓·勉學》。不得，不能、不可。雌黃，礦物名，可作顏料，古代用以涂改文字，后引申為信口更改、隨便亂說。沒有讀夠一定數量的書，對前人的見解沒有徹底了解，是不能隨便亂下結論、亂發議論的。書要多讀、話要謹慎；應當謙虛向學，不可妄自尊大。

在一個國家中，一個公民的自由就是所有人的自由。

The mind is its own place, and in itself can make a heaven of hell, a hell of heaven.

我們學得越多，就越意識到我們不知道的還有很多。

Inflation is the mechanism that can make the universe flat, homogeneous, and isotropic.

The elegance of a mathematical proof often mirrors the efficiency of the algorithm it describes.

The most important tool in science is not the microscope, but the mind.

The internet should be for everyone - it's too important to leave anyone behind.