目的可以证明手段的正当性，只要存在某种能证明目的正当性的东西。

Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.

Reality is a question of perspective; the further you get from the past, the more concrete and plausible it seems—but as you approach the present, it inevitably seems more and more incredible.

我是个流行谜团。我生活和呼吸着创造力。

我不害怕失败，我害怕不去尝试。