The problem with words is that you never know whose mouths they have been in.

The best mathematics is not just correct; it is illuminating.

攀上一座高山后，你才会发现，原来还有更多的山头等着你

People always think they’re going to write a book. They think they’re going to write a book, and then they don’t.

 如果一个人从确定性开始，最终将陷入怀疑；但如果他愿意从怀疑开始，最终将得到确定性。