The first step is to establish that something is possible; then probability will occur.
第一步是确定某件事是可能的；然后概率就会发生。
今天很残酷，明天更残酷，后天很美好，但绝大部分人死在明天晚上。
The most dangerous phrase in the language is, 'We've always done it this way.'
Collaboration in mathematics is essential; no one can solve all the problems alone.
I am certain of nothing but the holiness of the heart's affections, and the truth of imagination.