I’m a great believer in solving hard problems by using a checklist. You need to get all the likely and unlikely answers before you; otherwise it’s easy to miss something important.

Sometimes, the most dangerous lies are the ones we tell ourselves.

All the great things are simple， and many can be expressed in a single word： freedom， justice， honor， duty， mercy， hope.

最成功的公司是那些坚持自己价值观的公司。

真正的喜悦精神、崇高感、超越人类的感觉，这是最高卓越的试金石，在数学中同样可以在诗歌中找到。